Don't use hard-coded stylebits values for different lexers, query the correct value from Scintilla and use it (this fixes a display problem with Perl code like 'sub test()').
Add missing styles for filetype Perl.

git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@3019 ea778897-0a13-0410-b9d1-a72fbfd435f5