* fixed issue with mutated collection during enumeration
* copied library into demo projects
* updated library information (debug output in console)
* fixed issue because of which in certain situation sub/unsub/presence requests failed
* fixed issue because of which client was able to postpone requests while workspace is sleeping (Mac OS)
* added error code in case if developer will try to issue requests while workspace is sleeping
* copied library into demo projects
* updated library information (debug output in console)
Merge branch 'hotfix-t159' into 3.5.1rc1