Django-bootstrap3

- Rolled back subresource integrity (see 353)
- Documentation fix (thanks clokep)

- **BREAKING** For Django >= 1.10 Remove everything to do with setting HTML attributes `required` (337) and `disabled` (345)
- Add `id` parameter to bootstrap_button (214)
- Add `set_placeholder` to field and form renderers (339, thanks predatell)
- Default button type to `btn-default`
- Add `addon_before_class` and `addon_after_class` (295, thanks DanWright91 and others)
- Fix handling of error class (170)
- No size class for checkboxes (318, thanks cybojenix)
- Fix warnings during install (thanks mfcovington)
- Fix rare RunTimeError when working without database (346, thanks Mactory)
- Add subresource integrity to external components (thanks mfcovington and Alex131089)
- Several improvements to documentation, tests, and comments. Thanks all!

- Print help text and errors in their own block (329, thanks Matoking)
- Improved page urls in pagination (fixes 323)
- Changed setup.py to allow `setup.py test` run tests
- Removed link target from active page in pagination (fixes 328)
- Fixed example for bootstrap_label (fixed 332)
- Fixed tests to support Django 1.10 handling of required attribute, see 337 (needs fixing)
- Added tests for Django 1.10
- Bootstrap to 3.3.7

- Fixed bug with widget attrs consistency (onysos)

- Dropped support for Django < 1.8
- Dropped support for Python < 2.7
- Fix page number bug (thanks frewsxcv)
- Fix template context warning (thanks jieter and jonashaag)
- Update to Bootstrap 3.3.6 (nikolas)
- Show links and newlines in messages (jakub3279)
- CSS classes arguments passed to the bootstrap_form are now working (gordon)
- Support for Django 1.9/Python 3.5 (jieter and jonashaag)
- Better Travis CI Django versions (thanks jonashaag)
- Improved handling of messages in `bootstrap_messages` (thanks frewsxcv and rjsparks)

- Bug fix for escaped icons in buttons (reported by jlec)