CFY-759 mainly docs init
CFY-759 added tox support
CFY-759 fixed make dev
CFY-759 renamed test-requirements and dev-requirements and excluded docs build
CFY-759 travis and tox fix
Merge pull request #3 from cloudify-cosmo/feature/CFY-759-repo-optimizations

Feature/cfy 759 repo optimizations
update common version dependency
merging develop branch by the builder - release 3.0