android: added mail to about activity
android: fix file importing from adobe reader (and other apps with spaces in path)
core closes all threads and sockets gracefully on exit, no longer need System.exit - (swing-gui still requires it, though)
android: keep service running when showing sub-tasks, handle screen off correctly
fixed shutdown behaviour (also kill transfers)
android: fix some strings
android: never show stop button (consitency + looks bad without icon)
android: fixed ui updates from running transfers
android: simple package structure
android: renamed layout element ids
android: reworked remaining fixmes
android: removed remaining todos
fixed resource leak where a transfer socket was never closed
android: added/updated license/copyright header everywhere (+2014)
branding: added ".com"