Fix various issues in our html files, third batch
Fix various issues in our html files, fourth batch
Position tests: Simplify logic and reduce tests.
Position: Added tests for flipfit.
Merge branch 'master' into position-notification

Conflicts:
	tests/unit/position/position_core_within.js
Use length property, instead of the deprecated size() method.
Tests: Check for null error objects when reporting JSHint errors.
Position tests: Fixed typo.
Grunt: Add sizer_all to compare sizes of individual components
Position: Extend unit test for using to check feedback properties
Position: Fix scrollbar calculcation to correctly take overflow:scroll into account, along with unit tests
Merge branch 'position-notification'
Position: Remove at-center guards, take at:center into account instead. Fixes #8127 - collision:flip should be supported for at:center
Grunt: Update to latest grunt-compare-size plugin
Accordion: Removed unused variables.
Fix various issues in our html files, fifth batch
tests visual position: minor refactor
Grunt: Ignore ajax content test files in htmllint task
Position: Fix markup for deprecated tests. Insert/remove some new lines to make comparision to position.html trivial
Partial revert to fix IE6 regression in 258a637