Sqlalchemy-datatables

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Fixed
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- Fix sdist with missing package (116).

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Removed
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- `BREAKING` - Drop python 2 support.

Changed
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- Convert tests to pytest.
- Reorganize code.
- Modernize Flask example.
- Modernize pyramid example.
- Change and apply different linting style.
- Rename .jinja2 templates to .html.
- Update to python 3.6.
- Automatic deploy to Pypi from Travis.

Fixed
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- Fix DT crash when no `draw` parameter (98).

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Changed
~~~~~~~
- Update the flask example to reflect the new API.

Fixed
~~~~~
- Fix tests on Travis by refactoring and using persistant database.
- Fix PEP8.

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Added
~~~~~
- Support `length=-1` to disable paging.

Changed
~~~~~~~
- Use `codecov` to run coverage.
- Use `py.test` to launch tests on Travis.

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Added
~~~~~
- Reimplement API to rely on SQLALchemy core functions.
- Return error messages as 'error' property in result.
- Add tearDown to the tests.

Changed
~~~~~~~
- Update the pyramid example to reflect the new API.
- Enhance regular expressions search.

Removed
~~~~~~~
- Drop support for datatables <= 1.10.x.
- Drop python 2.6 and pypy3 from Travis.

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Added
~~~~~
- Allow regex from columns to support yadcf multi_select.

Fixed
~~~~~
- Fix error while using outerjoin in the query.