Modify .gitignore rules for source/lib/font-awesome (#832)

Author: zombie110year

.gitignore

@@ -12,7 +12,7 @@ source/lib/*
 # Track internal libraries & Ignore unused verdors files
 source/lib/font-awesome/less/
 source/lib/font-awesome/scss/
-!source/lib/font-awesome/*
+!source/lib/font-awesome/
 
 !source/lib/jquery/