verified: basically works
todo: better handling of parse errors.
Currently this is treated as an unexpected exception and just
terminates the whole application, without any suitable diagnostics.
This makes working on the stylesheet somewhat brittle. GTK-3 actually
offers a signal to be invoked in case of CSS parsing errors
(see #953)
Lots off commented out blocks of code
but most issues are related to simple function name changes,
set/get_flags calls, anything that has to do with a Gtk::Style...
Plan of attack from here is to go one-by one of each commented-out or code and update to gtk3 specs.
- using std::tr1::shared_ptr in namespace gui
- thus removing a lot of std::tr1 qualifications
- fix some includes. Should be relative to 'src'
- interface classes should declare a virtual dtor!
- split off the tricky basic GTKmm includes
- reduce the clutter in the gtk-lumiera.header
- make GtkLumiera a singleton, placed into static memory
- remove all static functions from WindowManager
