Release package

[dshemetov]

Need to release the package: polish it and put it on PyPI.

TODO:

• add documentation
  • get documentation buildable
  • Package evaluation & first pass documentation #9
  • sign up for hosting on readthedocs.org #35
  • port R vignettes and examples over #36
• add tests
  • use the example non-trivial calls as tests for data typing Port public R queries #31
  • Find non-trivial query for Norostat #33
• make sure the endpoint interfaces are the same
  • rename endpoints to pub_ when needed
  • double check that argument order is the same
  • add support for geo_value = "*" default on most endpoints
  • add caching #34
• bug fix
• make sure the API JSON -> Pandas DataFrame type casting is correct and fast refactor+clean: simplify package internals and clean configs #28
• remove non-Pandas return options and return df by default (for most endpoints) refactor+clean: simplify package internals and clean configs #28