Fix external javascript use cases

Fixes:

• Selectors in new(ish) external Javascript (#205)
• StopIteration exception when rendering field without choices using django-bootstrap3 (#206)

Thanks to:

• Anton Samarchyan (@desecho)
• Serhiy Romanov (@optiz0r)

Fix USE_DJANGO_JQUERY option

Special thanks to:

• @desecho for PR #204.
• @jacktrades for discussion about security implications of the filtering endpoints

Restrict results to only models with fields from smart_selects

Issue #201 pointed out that the URL endpoints allowed anybody to list arbitrary objects by tweaking the URL parameters.

This release adds checks to the views to ensure that queries return an HTTP 403 (Permission denied) for models that do not have smart_selects fields defined.

Please keep in mind that it is still possible to query models with smart_selects fields.

Special thanks to @ng-celes for reporting #201.

Use external Javascript

Should fix adding forms in formsets.

Special thanks to @vborras for doing the heavily lifting.

Fix chained CharField for Django 1.8 & 1.9

• From #188 - fix chained CharField for Django >= 1.8 to < 1.10 (with tests)

New release since we haven't had a release in a long time

Amongst other things, contains fixes for:

• [52bc3b0] XSS select dropdown rendering
• [4f817d6] Handle nulls better
• [8b3a681] Regression fixes
• [64fe31c] Don't duplicate jQuery imports
• [f299de9] Flake8
• [b58f7ae] Using horizontal widget in admin

Additionally, we will now attempt to have every future release on both GitHub and PyPI.

Thanks to:

• Maciej "RooTer" Urbański
• Jim Kutter
• savoirfairelinux
• jorgecorrea

Special thanks to:

• Jakub Szafrański