Merge pull request #34 from anatoliykmetyuk/develop

Template tree refactored
Added checkboxes for AAToBeExecuted; improved font sizes
Removed SubScriptActor synchronization message
Added logging
Work in progress: adding support for actor message handling with << ... >>
Work in progress: adding support for actor message handling with << ... >>
Work in progress: adding support for actor message handling with << ... >>
Changed syntax of if-expression and added do-expressions in parser; prepared recognizing ~~> token in scanner.

Updated LifeFrame and PingPong examples.

TBD: rename then and then_else to do_then, do_else and do_then_else, and support these in VM
Branches merged