Don't keep comments in configuration file to work around a bug in newer GLib versions.
If config file doesn't exist, try to load a global one from $prefix/share/geany/.
Don't create an empty geany.conf as write test, use access() instead.		   


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@1579 ea778897-0a13-0410-b9d1-a72fbfd435f5