update requirements and bump version number
Merge branch 'release/0.1.9'

* release/0.1.9:
  update requirements and bump version number
  put ``autocreate`` function into ``apps`` submodule
  update test suite
  fix imports
  update requirements.txt
  drop python 2.6 support
  Update README.rst
  Update README.rst
  Update README.rst
  Update README.rst
  fix typo in .travis.yml
  add .travis.yml
Merge tag '0.1.9' into develop

0.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.90.1.9

* tag '0.1.9':
  update requirements and bump version number