Skype 6.5.0.158

# Fixed Issues:
* File transfer
- Cancel all doesn’t cancel file transfers
- Upon cancel of file transfer the transfer shows as successfully completed
- When one participant accepted file transfer, sender could not cancel the transfer
* Network issues
- Upon connection lost, no notification in call toolbar that the call was lost
* Keyboard navigation
- Add phone number not accessible with keyboard
* Stability
- Skype hangs when selecting offline contact and clicking on call phone
- Skype crashes for some users upon exiting
- Skype crashes for some users when tried to send a file