support installation on Linux

1. Add vnote.desktop and related icons for Linux;
2. Update app icon.

src/resources/icons/vnote.svg

@@ -4,13 +4,13 @@
  <title>vnote</title>
  <g>
   <title>Layer 1</title>
-  <rect fill="#d6eace" stroke-width="5" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" x="7.347208" y="7.734668" width="689.270961" height="689.192807" id="svg_11" stroke-opacity="0" rx="40" ry="40" stroke="#000000"/>
-  <path fill="#15ae67" stroke-width="null" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" d="m281.05692,660.46829l0,-280.60453l281.40245,280.60453l-281.40245,0z" id="svg_16" stroke-opacity="0" stroke="#000000" transform="rotate(90 421.7581481933593,520.1660156250001) "/>
-  <path fill="#15ae67" stroke-width="null" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" d="m281.08756,379.17628l0,-280.60453l281.40245,280.60453l-281.40245,0z" stroke-opacity="0" stroke="#000000" id="svg_17" transform="rotate(-90 421.7887878417969,238.8740081787109) "/>
-  <path fill="#15ae67" stroke-width="null" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" d="m182.33522,619.21682l0,-198.20758l198.91257,198.20758l-198.91257,0z" stroke-opacity="0" id="svg_18" transform="rotate(45 281.79150390625006,520.113037109375) " stroke="#000000"/>
-  <path fill="#75c5b5" stroke-width="null" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" d="m422.02674,238.38294l0,-139.89771l140.29552,139.89771l-140.29552,0z" stroke-opacity="0" id="svg_19" transform="rotate(90 492.17449951171875,168.43408203125006) " stroke="#000000"/>
-  <path fill="#15ae67" stroke-width="null" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" d="m113.18218,170.570288l99.16604,-100.31204l99.16604,100.31204l-99.16604,100.31204l-99.16604,-100.31204z" id="svg_21" stroke-opacity="0" transform="rotate(45 212.3482208251953,170.57028198242185) " stroke="#000000"/>
-  <path fill="#15ae67" stroke-width="null" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" d="m141.1856,380.95421l0,-139.8977l140.29551,139.8977l-140.29551,0z" stroke-opacity="0" stroke="#000000" id="svg_23" transform="rotate(90 211.3333587646484,311.00537109375006) "/>
-  <path fill="#15ae67" stroke="#000000" stroke-width="null" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" d="m282.42881,239.57986l-141.06249,141.17188l0,139.21875l140.0625,-140.0625l0.99999,-140.32813z" id="svg_39" stroke-opacity="0"/>
+  <rect stroke="#000000" ry="40" rx="40" stroke-opacity="0" id="svg_11" height="704.510604" width="704.290516" y="-0.083155" x="-0.246548" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="5" fill="#d6eace"/>
+  <path transform="rotate(90 421.7581481933593,520.1660156250001) " stroke="#000000" stroke-opacity="0" id="svg_16" d="m281.05692,660.46829l0,-280.60453l281.40245,280.60453l-281.40245,0z" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="null" fill="#15ae67"/>
+  <path transform="rotate(-90 421.7887878417969,238.8740081787109) " id="svg_17" stroke="#000000" stroke-opacity="0" d="m281.08756,379.17628l0,-280.60453l281.40245,280.60453l-281.40245,0z" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="null" fill="#15ae67"/>
+  <path stroke="#000000" transform="rotate(45 281.79150390625006,520.113037109375) " id="svg_18" stroke-opacity="0" d="m182.33522,619.21682l0,-198.20758l198.91257,198.20758l-198.91257,0z" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="null" fill="#15ae67"/>
+  <path stroke="#000000" transform="rotate(90 492.17449951171875,168.43408203125006) " id="svg_19" stroke-opacity="0" d="m422.02674,238.38294l0,-139.89771l140.29552,139.89771l-140.29552,0z" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="null" fill="#75c5b5"/>
+  <path stroke="#000000" transform="rotate(45 212.3482208251953,170.57028198242185) " stroke-opacity="0" id="svg_21" d="m113.18218,170.57029l99.16604,-100.31204l99.16604,100.31204l-99.16604,100.31204l-99.16604,-100.31204z" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="null" fill="#15ae67"/>
+  <path transform="rotate(90 211.3333587646484,311.00537109375006) " id="svg_23" stroke="#000000" stroke-opacity="0" d="m141.1856,380.95421l0,-139.8977l140.29551,139.8977l-140.29551,0z" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="null" fill="#15ae67"/>
+  <path stroke-opacity="0" id="svg_39" d="m282.42881,239.57986l-141.06249,141.17188l0,139.21875l140.0625,-140.0625l0.99999,-140.32813z" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke-width="null" stroke="#000000" fill="#15ae67"/>
  </g>
 </svg>

src/src.pro

@@ -116,3 +116,40 @@ else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$OUT_PWD/../peg-
 else:win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$OUT_PWD/../peg-highlight/release/peg-highlight.lib
 else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$OUT_PWD/../peg-highlight/debug/peg-highlight.lib
 else:unix: PRE_TARGETDEPS += $$OUT_PWD/../peg-highlight/libpeg-highlight.a
+
+## INSTALLS
+unix:!macx {
+    isEmpty(PREFIX): PREFIX = /usr
+    DATADIR = $${PREFIX}/share
+
+    # install desktop file
+    desktop.path = $${DATADIR}/applications
+    desktop.files += vnote.desktop
+
+    # install icons
+    icon16.path = $${DATADIR}/icons/hicolor/16x16/apps
+    icon16.files = resources/icons/16x16/vnote.png
+
+    icon32.path = $${DATADIR}/icons/hicolor/32x32/apps
+    icon32.files = resources/icons/32x32/vnote.png
+
+    icon48.path = $${DATADIR}/icons/hicolor/48x48/apps
+    icon48.files = resources/icons/48x48/vnote.png
+
+    icon64.path = $${DATADIR}/icons/hicolor/64x64/apps
+    icon64.files = resources/icons/64x64/vnote.png
+
+    icon128.path = $${DATADIR}/icons/hicolor/128x128/apps
+    icon128.files = resources/icons/128x128/vnote.png
+
+    icon256.path = $${DATADIR}/icons/hicolor/256x256/apps
+    icon256.files = resources/icons/256x256/vnote.png
+
+    iconsvg.path = $${DATADIR}/icons/hicolor/scalable/apps
+    iconsvg.files = resources/icons/vnote.svg
+
+    target.path = $${PREFIX}/bin
+
+    INSTALLS += target desktop icon16 icon32 icon48 icon64 icon128 icon256 iconsvg
+    message("VNote will be installed in prefix $${PREFIX}")
+}

src/vnote.desktop

@@ -0,0 +1,11 @@
+[Desktop Entry]
+Type=Application
+Version=1.0
+Name=VNote
+GenericName=Markdown Note
+Comment=Note-taking application for pleasant Markdown
+Icon=vnote
+Terminal=false
+Exec=VNote
+MimeType=text/markdown;
+Categories=Qt;Utility;TextEditor;Office;