Remove compiler specific flags.
Add configure option to specify the path to libvte.so.
Remove many unnecessary configure checks.
Stop configure if msgfmt was not found(gettext not installed).


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@1961 ea778897-0a13-0410-b9d1-a72fbfd435f5