Addon WindowsPhonePush

Addon serves 3 tasks: 1) deliver settings in json format 2) update
settings with the device URL 3) cron-hook to regularly check and push
new entries
messages.po created

messages.po file created by run_xgettext.sh as instructed by fabrixxm.
Merge pull request #221 from gerhard6380/windowsphonepush

Addon WindowsPhonePush