Started adding support for AirPlay, discovery is almost done, AirPlayService is not yet implemented
Resolved issue where new web app connections would fail after initial connection, fixes #15
Initial pass of media playback/control capabilities for AirPlay

Still missing media subscriptions, clean switch between image & audio/video, volume control, web app launching
Set DLNA timeout to 30 to avoid broken state
Switched chrome cast volume controls over to system volume, not stream volume
Changed capabilities of Netcast based on version number
Fixed a few issues in Netcast service which caused app list and app launch to sometimes fail on 2012 LG TVs, fixes #7
Fixed an issue in which DLNAService objects from device store were causing connections to fail
Fix sending mixed delete/insert text commands for WebOSService.

Change kKeyboardEnter/kKeyboardDelete to strings that are unlikely
to conflict with legitimate input.
Added convenience method joinWebAppWithId
Added documentation for WebAppSession.join
Fixed small bug with retrieving/storing a device in device store
Fixed issue with device stoer
DevicePicker now shows service label if DEBUG or if 0 device filters
Increased SDK version number to 1.2.1
Fixed crash in SSDP discovery
Fixed some issues with the discovery not properly notifying about device loses & rediscoveries
Removed TODO item
Fixed threading issue in DevicePicker
Fixed some issues with bringing devices out of device store