Package more Maemo packages and switch upstream to maemo-leste (#1015)

* Package more maemo apps/libs (including Maemo X Terminal osso-xterm)
* Put libhildondesktop examples into separate package
* Change upstream url in Maemo packages to https://github.com/maemo-leste
Update hildon-desktop and iphbd to their newer repo versions. This includes the fix for the bug when switching between multiple windows in hildon-desktop.
* Use version tags instead of specific commits for Maemo packages