add groovy 2.1.1 and update other groovy minor ver
fix a bug that some tests do not consider when disabling cpu time measuring
add warn() and change all the destinatins to stderr
fix Issue 8 BenchmarkWarumUp#run may loop very long or even forever
hide *.iml from git
fix wrong minor version is used for groovy 2.1
show the time limit of auto warm up
fix wrong minor version number of groovy 2.1 for binary target
add label to timeout warning
add stage-all target
back to use stdout for info/trace logging and use simpler format for warn/error logging