AUI-1300 Changing css so the scrollbar will only show up when necessary
AUI-1455 Change listener method names on ImageViewer modules

Listeners should each have a separate method, even if that method will just call a single function, as that later helps people to extend our modules. The image viewer modules had lots of listeners that are not following this pattern, so this is fixing those.
AUI-1528 Drop Zone on Form-Builder Styling is off
AUI-1532 The gulp watch task doesn't work for css files

Gulp watch doesn't rebuild the module when css files change, like grunt task used to do. This is just adding one more path for the watch to work with css as well.
AUI-1532 Remove duplicated glob
AUI-1529 Change width ratio of form builder columns

The form builder's 2 columns were taking 50% of the page each. That doesn't look good for the first column on big screens though, so adding a few more bootstrap classes to make the percentage smaller for the first column on bigger screens.
AUI-991 Add events to audio and video modules
AUI-991 Source formatting
AUI-991 Standardize logs using 'Y.log' instead of 'console.log'
AUI-991 Source formatting
AUI-1450 Fixing for the case when paginator is not defined
AUI-1450 Adding tests
AUI-1450 - Source formatting
AUI-1533 Add missing class docs to the Affix class

Signed-off-by: Henrique Vicente <henriquevicente@gmail.com>
Merge pull request #630 from henvic/AUI-1533

AUI-1533 Add missing class docs to the Affix class
AUI-1366 Aria-labelledby and keyboard accessibilty
AUI-1366 - Increased keyboard traversability
AUI-1366 - Changed expand/collapse feature
AUI-1366 - source formatting
AUI-1366 - switch from aria-labelledby to role=treeitem and aria-pressed