bump(dev-libs/glib): sync with upstream

Update glib and assorted dependencies, our version is so out of date it
prevents updating other ebuilds.

Packages updated:
  app-text/yelp-tools
  dev-libs/dbus-glib
  dev-libs/expat
  dev-libs/glib
  dev-libs/gobject-introspection
  dev-libs/gobject-introspection-common
  dev-libs/libffi
  dev-util/gdbus-codegen
  dev-util/gtk-doc
  dev-util/gtk-doc-am
  dev-util/itstool
  gnome-extra/yelp-xsl
  virtual/libffi
  virtual/libiconv
bump(eclass): sync with upstream

Update eclasses and profiles. Since python2.6 has been dropped from the
allowed list in the python eclass all ebuilds must stop referring to it
so a extra ebuilds have to get pulled in with this change.

Packages removed:
  dev-python/argparse
  virtual/python-argparse
  virtual/python-unittest2

Packages updated:
  app-portage/gentoolkit
  dev-lang/python-exec
  dev-libs/boost
  dev-libs/libxml2
  dev-libs/libxslt
  dev-python/dbus-python
  dev-python/logilab-common
  dev-python/lxml
  dev-python/mock
  dev-python/pygobject
  dev-util/cmake
  dev-vcs/git
  eclass
  licenses
  profiles
  scripts
  sys-devel/automake
  sys-devel/automake-wrapper
  sys-fs/cryptsetup
Merge pull request #131 from marineam/updates

First major round of updates in portage-stable in ages