Release 1.3

+ Use background service to track beacons.
+ Provide offline mode to cache data when network is not available.
+ Use broadcast to receive data from lighthouse SDK.
+ Add function of disabling ranging or mornitoring.
+ Change the inside expiration time in milliseconds to 45 seconds
[d] update sdk
update sdks file
Merge pull request #6 from inlight-media/release-1.3

Release 1.3