Updated dgen.py version to 0.2.1.
Updated dgen.py version to 0.2.1.

codeaudit/myriad-toolkit,codeaudit/myriad-toolkit,TU-Berlin-DIMA/myriad-toolkit,TU-Berlin-DIMA/myriad-toolkit,codeaudit/myriad-toolkit,TU-Berlin-DIMA/myriad-toolkit,codeaudit/myriad-toolkit