Merge pull request #62 from anatoliykmetyuk/develop

Porting SubScript to JVM 8
Merge pull request #63 from anatoliykmetyuk/develop

Simple untyped dataflow is working
Minor improvement in GraphicalDebugger; exitDebugger script
Cosmetic improvements in OperatorsSuite
Minor improvement in CodeExecutor
Typer: Added file+pos information in code generated for script calls, thereby solving clueless error messages
Workaround for dealing with issue #64: method call after annotation requires to be enclosed in braces
Annotation code can now access both `here` and `there`; the latter is implicit.
Improved termination condition in ScriptExecutor, hopefully.
Improved tracing support in ScriptExecutor and GraphicalDebugger.
GraphicalDebugger tended to lock up during execution; in this version this seems over, at the cost of tracing a few kinds of messages.
When these tracings are commented out the lock up returns. There is obviously a race condition somewhere, but its exact nature is yet unknown.
isEmpty method of the MessageHandlers is implemented