Added test and deploy to docker and pypi functionality to circleci

[mmanogaran]

• only runs test_and_deploy jobs when commits are tagged in the form "^[0-9].[0-9].0-9?$"
  • doesn't care which branch the commit is on. the tag is how it filters
• needs 6 environment variables :
  • $PYPI_USER
  • $PYPI_PASS
  • $TESTPYPI_USER
  • $TESTPYPI_PASS
  • $DOCKER_USER
  • $DOCKER_PASS
• pulls and deploys to tigrlab on dockerhub
• $CIRCLE_TAG not working so instead using git to pull and store tags in $GIT_TAG
• docker version is check is commented out. fmriprep_ciftify needs a --version option to properly test version before deploying
• added a VerifyVersionCommand to setup.py that uses $GIT_TAG