FIX: syntax error test04 and 11 circleci v2

Merge pull request #149 from connectomicslab/release/v3.1.0

REL: v3.1.0

Merge pull request #184 from connectomicslab/release/v3.0.4

REL: v3.0.4

MISC: Update release date in cmp/info.py [skip ci]

ENH: Create main() and check_and_return_valid_nb_of_cores() in run.py

FIX: Specify content type of long_description in setup.py and setup_p…

…ypi.py

CI: Revert to circleci/python in deploy-pypi-release [skip ci]

MAINT: Set debug=False in methods of cmtklib/config.py

Merge pull request #62 from connectomicslab/v3.0.0-RC3

PR dedicated to Connectome Mapper V3.0.0 Release Candidate 3

DOC: update changes.rst [skip ci]