Generator ant task: expose in-place transformation option; refactor the way parameters go through the script
MPS generation options are exposed in build language
Expose parallel thread count option
With generation sequence partitioning which is not part of build specification, it's troublesome to keep generation options on a per-module basis.
For now, let specify the options once per BuildProject. Use these options, if specified, to parameterize generated Ant task
Merge remote-tracking branch 'origin/master' into 3.1/artem/GeneratorAntTask
Regenerated with newly added generator options in mps.build.mps