Write rough draft release documentation for incremental updates.
Don't autostart iceweasel...

...but notify when Tor is ready
Uncomment tor bootstrap progress function
Warn before launching iceweasel if Tor isn't ready
Update iceweasel profile generation script
Language fixes

- Avoid using contractions
- Say "browse the Internet"
- Use "start" instead of "launch"
Make test suite use native ruby + rjb instead of JRuby etc.
Switch from systemtimer to Ruby's timeout module in test suite.

systemtimer was relevant in Ruby < 1.9 (and is only available in for
such versions of Ruby in Debian).
Take screenshots through Sikuli instead.

This is much more reliable, and has fewer dependencies.
Update test suite setup docs.
Drop some unnecessary dependency checks.
Merge branch 'devel' into test/rjb-migration
Wheezy's cucumber is good enough for the test suite.
Merge remote-tracking branch 'origin/feature/incremental-upgrades' into feature/incremental-upgrades

Conflicts:
	wiki/src/contribute/release_process.mdwn
adding links to Git's doc
replacing Whisperback by WhisperBack
translations all over the place
Merge branch 'devel' into feature/incremental-upgrades
Merge branch 'master' of git://git.tails.boum.org/tails

Conflicts:
	wiki/src/doc/advanced_topics/cold_boot_attacks.fr.po
	wiki/src/doc/first_steps/shutdown.fr.po
Merge branch 'master' of git://git.tails.boum.org/tails