Fixed broken link to tablib readme

Geo widget doesn't work by https #1234

Test python 3.5 on travisci, and use coveralls and pylint.

Support Python 3.5

Fix missing code in docstrings

fixes #1131 - broken action redirect in FileAdmin

Allow to use empty url for AdminIndexView

Tablib export

Little fix of mongoengine usage example

Remove needless line from the docs

It apparently was copy&pasted by mistake from previous example.

Adding block after filter in list view

More Flexible Exports Without Exceptions

simplify 'skip_checks' for #1194

Don't raise exceptions during export on column_formatters with macros when there is a valid column_formatters_export, column_export_exclude_list or column_export_list configuration available

add unit test for a related table's column object