New package: python-gobject2-2.28.6; replaces pygobject2

Add shlibs and remove obsolete.
pygtk: revbump against python-gobject2 and python-cairo
hooks/script-wrapper: create simple python{,3.4}-config wrappers.
python-cairo: use generic python-config wrapper.
python-gobject2: fix cross build and use generic python-config wrapper.
pygtk: fix cross build and use generic python-config wrapper.
vte: use generic python-config wrapper.
Revbump packages against python-gobject
Revbump packages against python-gobject2.
gst-python: pygobject2 -> python-gobject2.
linux-tools: update to 3.15.
pysqlite: renamed to python-sqlite; revbump pkgs that need it.
pyxdg: renamed to python-xdg; added 3.4 subpkg; revbump affected pkgs.
python-xdg: replaces pyxdg.
ibus: fixed build.
go: update to 1.3.
duplicity: switch to setuptools
eyeD3: switch to setuptools
mumble: update to 1.2.7
pelican: update to 3.3.0

Switch to setuptools.