Fixes #33

I am now checking that the --group and according options are not used w/o --sub-task.

A test case is yet missing, but will follow soon.

Note that I will need to modify bob.bio.gmm accordingly, unless someone finds a better and more generic solution to #33 (closed)

Accepting this merge will close #33 (closed).

Added 60 commits:

• d92c8de1...e8315bee - 59 commits from branch master
• 33d85e00 - Implemented fix for #33 (closed)

I now rebased this against master. If tests pass, I'll merge it. Thanks for the work, @mguenther

mentioned in issue bob.bio.gmm#6 (closed)

Reassigned to @andre.anjos

Unmarked this merge request as a Work In Progress

mentioned in commit 7a7b01d3

Status changed to merged