Add default fixtures for question and question options.

Default sizes are fairly sane, but expected to be tweaked by individual sites.
Respect the enabled flag on InquisitionQuestion

This flag was added in r78654 / 8a058941 but the loading of the bindings was never updated to respect it. Fix this oversight.
use the already existing VisibleInquisitionQuestionView instead of repeating the same logic
Split question bindings into two loaders - one for visible, and one for all.

@gauthierm pointed out in code review that we rely on the loader inlaces such as the admin that should not care about visibility.
Update admin tools to support the question enabled flag.

All of this is hidden by default - subclasses that want to use it can enable it.
Fix text questions not being returned as part of the visible question view.

The view assumed all questions needed options to be visible, but text questions never have options. This fixes that.
make visible question bindings cachable as well.
Add loader for response values of visible questions.
CS
Consistent titles and better false content.
Merge pull request #4 from isaacgrant/respect-question-enabled

Respect question enabled
Fix the file extension.
Merge pull request #12 from isaacgrant/image-fixtures

Add default fixtures for question and question options.