delay some UI initialization until necessary
clean-up in usb IDs
use Gtk.Application properly
debian packaging updates
don't str() translated device status; fixes #108
scrolling over the tray icon switches among devices; fixes #101

It now works for the standard systray as well, not just the
appindicator.
tray: always pick the lowest battery, if the user hasn't already
some strings were untranslated; fixes #100
po-update.sh without arguments re-formats all translation files
added translator credits to i18n documentation
re-formatted translation files
updated translator credits in about dialog
updated descriptors with a few more devices
merged solaar-cli functionality into main solaar binary