[gi-demos] added rotate text demo
[gi-demos] added rotate text demo

* needs some Pango Attr fixes to be 100% done, See FIXME

choeger/pygobject-cmake,choeger/pygobject-cmake,sfeltman/pygobject,davidmalcolm/pygobject,nzjrs/pygobject,thiblahute/pygobject,thiblahute/pygobject,thiblahute/pygobject,choeger/pygobject-cmake,nzjrs/pygobject,jdahlin/pygobject,pexip/pygobject,davidmalcolm/pygobject,alexef/pygobject,MathieuDuponchelle/pygobject,MathieuDuponchelle/pygobject,davibe/pygobject,davibe/pygobject,MathieuDuponchelle/pygobject,davibe/pygobject,GNOME/pygobject,alexef/pygobject,jdahlin/pygobject,GNOME/pygobject,pexip/pygobject,jdahlin/pygobject,davibe/pygobject,sfeltman/pygobject,davidmalcolm/pygobject,sfeltman/pygobject,nzjrs/pygobject,pexip/pygobject,alexef/pygobject,GNOME/pygobject