Fix focus issue on gnome-shell

This fixes issue #436 from guake's trac.
Problem was that after hiding guake's window the window below
doesn't get the focus back.

However, this fix seems to not work completely on ubuntu
(something with unity?).
Fix the FSF address in the headers of the files.

The Free Software Foundation has changed its address, this change
reflects it.
Let allow the signal.SIGTERM to fail

If os.kill(pid, signal.SIGTERM) fails, currently guake fails as well
we should allow this command to fail withouth throwing an
exception.
Properly handle ctrl (primary) on ubuntu 12+

This allows ctrl+space and similar to work.
Add Zoom-in/out
fixup Add Zoom-in/out
More fine-grained zooming

6 presses per doubling/halving of the scale factor
Allow <Ctrl>= to zoom in along with <Ctrl>+
Merge PR #207, zooming hotkeys
Merge pull request #146 from nevir/primary-as-control

Properly handle ctrl (primary) on ubuntu 12+
Fall back gracefully when notify-osd isn't running

[merge from gtk3]

Resolve PR #212, Debian #682271 and numerous others
Rename Norwegian Bokmål po file to nb_NO.po

Norway has two officially recognized languages: Bokmål Norwegian (ISO 639-3 nob)
and Nynorsk Norwegian (ISO 639-3 nno). IETF language tags for them would be
nb-NO and nn-NO, respectively.

Thanks Bjørn Lie <zaitor@opensuse.org> for the patch.

Fix Trac ticket 503
Fix GitHub issue #48
Update po/POTFILES.in
configure.ac: fix typo
configure.ac: sorted and updated ALL_LINGUAS
Added and updated translation files from Transifex
Update headers and copyrights of translation files
Preserve custom tab titles

GitHub issues #42, #44, #58
Trac 487, 515
Fix focus issue on gnome-shell

This fixes issue #436 from guake's trac.
Problem was that after hiding guake's window the window below
doesn't get the focus back.

However, this fix seems to not work completely on ubuntu
(something with unity?).
Fix the FSF address in the headers of the files.

The Free Software Foundation has changed its address, this change
reflects it.