tar: update to 1.27.1.
mit-krb5: update to 1.11.4.
kbd: update to 2.0.1.
xbps-git: bump version.
glibmm: update to 2.38.1.
xbps-git: revbump++
pixman: update to 0.32.4.
python: update to 2.7.6.
python: generate python{,2} symlinks again.
New package: mutt-1.4.2.3
Merge pull request #214 from jan-schreib/master

New package: mutt-1.4.2.3
mutt: enable pop/imap/ssl; make this cross buildable.
mutt: set missing configuration files.
caribou: update to 0.4.13.
clutter: update to 1.16.2.
gnome-screenshot: update to 3.10.1.
caribou: update checksum
gupnp-av: update to 0.12.4.
firefox: update to 25.0.1.
xbps-src: bump version.