Fixed issue with wrong state in heartbeat after update client state API usage
[#68792608]
* copied library into demo projects
* updated library information (debug output in console)
[#68792608]
* added ability to handle 'state-change' presence events and generate corresponding even (w/o this fix all such events will be interpret as simple message)
[#69153686]
Added pre-processing for received response to find out whether it correspond to required JSON structure or not.
[#65161072]
Merged with develop.
Update Libraries.
Fix tests related to client state(presence feature).
Formatting changes in client tests.
Clean client state test.
* Fixed issue with sending large messages and retry logic
[#69786150]
* Added class based logger which allow to manipulate over allowed log levels, dump file size and HTTP packets storage at run-time
[#65159444]
* copied library into demo projects
* updated library information (debug output in console)

[#65159444]
Remove unused old tests.
Update project settings for HOWTO/APNSVideo
Update project settings for HOWTO/CallsWithoutBlocks
Update project settings for HOWTO/ClientSidePresence
Update project settings for HOWTO/HelloWorld
Update project settings for HOWTO/SimpleSubscribe
Update project settings for HOWTO/ULSMethods
Update project settings for iOS/tests