threads working ...
Thread.wait
notes etc
some work on concurrency
remove copy of vm from thread
revert changes
Merge branch 'master' of https://github.com/clever-lang/clever
stuff on concurrency
Merge branch 'master' of https://github.com/clever-lang/clever

Conflicts:
	modules/std/concurrent/thread.cc
concurrency stuff
woops
- Partial fix for environment issue when calling returned anonymous function
- Added test
Merge remote-tracking branch 'upstream/master'
- CS
- Add a default ctor here
- Removed unnecessary code, CS
- Some updates on testrunner code (including fix for issue #263)
- CS
- Constness