Add preferences for default end of line characters for new files (closes #1895362) and to disable the automatic continuation of multi-line comments in C-like languages.
Enable multi-line continuation also for CSS files.

git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@2580 ea778897-0a13-0410-b9d1-a72fbfd435f5