Add field validation for datetime fields and option points.
Remove support in Javascript for "default" (empty) dates and update the template rendering script to support this in the JS tests.
Add maxlength attribute to authoring editor textareas
Broadens the scope of the validation alert, and adjusts the editor height based on the alert height

Conflicts:
	openassessment/xblock/static/js/openassessment-studio.min.js
Merge pull request #559 from edx/will/ora-735

Add maxlength attribute to authoring editor textareas
Added in animations
Merge pull request #565 from edx/grady/validation-sassafrass

Animations!
Attempted to fix safari blue tab issue
Make highlight field class less specific
Hide validation alert after validation is complete instead of before
Ensure that all validation errors are marked.
Fixup for template test case: ensure peer assessment has a date
Fixup: datetime field regression
Merge pull request #568 from edx/grady/safari-blue-tabs

Attempted to fix safari blue tab issue
Change validation highlighting to use a border instead of a color
Refactor integer field validation
Add field validation for peer assessment must grade and must be graded by.
Merge remote-tracking branch 'origin/authoring' into will/js-field-validation

Conflicts:
	openassessment/xblock/static/css/openassessment.css
	openassessment/xblock/static/js/openassessment-studio.min.js
	openassessment/xblock/static/js/src/studio/oa_container_item.js
	openassessment/xblock/static/js/src/studio/oa_edit_rubric.js
	openassessment/xblock/static/sass/oa/utilities/_developer.scss
Fixup: do not show NaN in student training labels
Update validation error message string.
Fixup: resolve merge conflict with sass
Merge pull request #570 from edx/will/js-field-validation

Will/js field validation
Show a warning when the user disables an assessment.