new test files from TestTWF
Updated the tests with the recommended changes
add draggable_attribute, dropzone_attribute and dragevent TCs
fixes on MS async tests + rm trailing ws
Remove some useless tests.
Move and rewrite Microsoft's test for the range input type.
Tests for HTML form checkbox input elements
Merge pull request #565 from angrytoast/angrytoast/html-form-input-checkbox

Tests for HTML form checkbox input elements
fix typo in caption_001.html
Merge pull request #568 from Revlin/revlin/html

Fix typo in event_loadstart.html.
Merge remote-tracking branch 'upstream/master' into ms-async
remove/update comments
decrease timeout
test refactoring
fix 5 issues raised by reviewer
remove tests covered by html/dom/interfaces.html
remove unexpected whitespaces
Merge pull request #280 from ibelem/submission/ibelem/draganddrop

draggable_attribute, dropzone_attribute and dragevent
use step_func instead
Merge pull request #557 from deniak/ms-async

fixes on MS async tests + rm trailing ws
Merge pull request #559 from Ms2ger/ms-interface

Remove some useless tests.
Update formatting