Merge tag '0.1.8' into develop

new release 0.1.8

* tag '0.1.8':
  bump version number
add .travis.yml
fix typo in .travis.yml
Update README.rst
Update README.rst
Update README.rst
Update README.rst
drop python 2.6 support
update requirements.txt
fix imports
update test suite
put ``autocreate`` function into ``apps`` submodule
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