Fixes #240. Apparently jQuery serialize() doesn't include type=file
values, so we must perform additional check if changed fields has
any type=file field in it.
Set default ordering by sortable in SortableStackedInlineBase.
Related to #240
Fix sortable inlines changes detection for select element.
Related to #232
Tests: Remove Django 1.4.0 from Travis tests, because tests suddenly
started failing with python2.7.6 and assertHTML with no valid reason.
Version bump to 0.2.9
Notice about importance of order of apps in INSTALLED_APPS

Copied the info about the order of suite in INSTALLED_APPS to the appropriate section.
Makes error_base.html safer
Docs: Add "important" block syntax to apps order note
Travis: Remove python 3.2 tests. Add python 3.4 tests
Merge branch 'patch-1' of https://github.com/mauler/django-suit into mauler-patch-1
Add checking if user has access to admin (user.is_staff) before
showing "Go to admin" button in error template.
Merge branch 'develop' into titusz-fix-dj17-NoReverseMatch