Fix issue 121 replacing songbird protocol by ngale

This replace the current songbird: protocol by ngale: so there is no conflicts between the two apps.
second part of fixing #121
test commit to make sure the mac buildbot is still working (and the others too, for that matter @GeekShadow - we need to coordinate build times sometime)
end the test commit
add addons url in the branding
Replace Add-ons URL by add_ons.url
use enable instead of with for libnotify config option and add it to README
remove songbird wiki links from README
Updated splash screen
Replace every ... by … in en-US
Reverse inner double-quotes by single-quotes
Add section for config deps in README and add libnotify dep info
Update en-US locale with past changes from L10n work
Use correct cflags
remove unused vars
Remove preferences entry in Tools menu as per SB-bug #10030
Replaced songbird: protocol by ngale: part of issue #121
Allow add-ons to have localized display panes titles originally fixed in #5 (1.8 release)
Change LastFM add-on ID, replaced locales code, updated ukrainian translation thanks to @dyedfox
Sync Last.fm translation with Adofex, update de/fr/tr locales