Do go get as part of build unless fast build requested (fixes #31)

build.sh

@@ -3,21 +3,27 @@
 version=$(git describe --always)
 buildDir=dist
 
-if [[ -z $1 ]] ; then
+if [[ $1 == "-f" ]] ; then
+	fast=yes
+	shift
+fi
+
+if [[ $fast != yes ]] ; then
+	go get
 	go test ./...
+fi
+
+if [[ -z $1 ]] ; then
 	go build -ldflags "-X main.Version $version" \
 	&& nrsc syncthing gui
 elif [[ $1 == "tar" ]] ; then
-	go test ./...
 	go build -ldflags "-X main.Version $version" \
 	&& nrsc syncthing gui \
 	&& mkdir syncthing-dist \
 	&& cp syncthing README.md LICENSE syncthing-dist \
 	&& tar zcvf syncthing-dist.tar.gz syncthing-dist \
 	&& rm -rf syncthing-dist
-else
-	go test ./... || exit 1
-
+elif [[ $1 == "all" ]] ; then
 	rm -rf "$buildDir"
 	mkdir -p "$buildDir" || exit 1