add .gitignore for docs/

SVN-Revision: 9992

docs/.gitignore

@@ -0,0 +1,15 @@
+*.log
+*.aux
+*.toc
+*.out
+*.lg
+*.dvi
+*.idv
+*.4ct
+*.4tc
+*.xref
+*.tmp
+*.dvi
+*.html
+*.css
+*.pdf