Sharing files w/FrostWire from third party apps UX upgrade.

 - If a media file is shared with FrostWire from a third party
   app, FrostWire will make the file available for Wi-Fi sharing
   and show the shared file on "My Files"

 - If the file is a .torrent, it will start the torrent transfer
   and show it to the user.
Merge pull request #174 from gubatron/issue-13-show-my-files-on-share-files

Sharing files w/FrostWire from third party apps UX upgrade.
changelog update. version 1.4.2 - build 155
Avoid possible NPE.
Simple rename refactor.
Merge branch 'master' into apollo.