'New with template' is used before any documents of the same filetype
are open.
Load filetype keyfiles from filetypes_load_config(), not from
styleset_foo_init().
Add highlighting_init_styles(), highlighting_set_styles(),
simplifying a lot of styleset function code.
Remove filetype::style_func_ptr field.


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@2011 ea778897-0a13-0410-b9d1-a72fbfd435f5