cwiid

added missin,g #include statements

*Got rid of the wmdemo, as well

*Even more pruning

*More pruning of the gui objects to allow for flatpak builds.

*Added --with-pkgmod option, to allow for customization of the gtk+-2.0 vs gtk+-3.0 customization. Default is "gtk+-2.0 gthread-2.0". For gtk3, use --with-pkgmod="gtk+-3.0 gthread-2.0".