Transition: Disable animationEnd callback on transition reset.

Fixes rare race condition with modals where animationEnd callback on dimmer could fire before modal's one, calling .transition('reset') on modal right before animationEnd event for it arrives, causing module.complete callback to restore incorect conditions, making modal visible when it shouldn't be, causing next modals to misbehave.
Comment unused sticky menu item
Comment unused sticky menu item
Merge pull request #548 from MohammadYounes/docs

Docs: Remove unused sticky menu items
Doc: Added missing forward icon
Doc: Matched icon labels with classes
Doc: Synchronized icons label and class word order
Doc: Removed arrow class from location icon
Doc: Reordered icons existing code
Doc: Typo in attention icon
Doc: Removed missing icons from existing code
Doc: Icon class typos
Doc: Added existing code for basic social icons
Prevent menu button color inheritance.

Buttons within .ui.menu, that are styled above anchor (`a`) tag, are colored inappropriately.

This fixes it.
Fixed labeled menu icon button icon positioning.

A .button.labeled within .ui.menu > .item has icon vertically aligned closer to bottom, not middle.

This fixes it.
In-Menu input action button corrections.

Action button within menu had some sizing and positioning issues.

This attempts to fix it.

Tested with large, normal, small menus; .button, .icon.button, .labeled.button. All 9 combos.
Merge pull request #551 from mishak87/patch-2

Doc was missing forward icon in Media Actions
Update CONTRIBUTING.md

Adds grunt to contributing docs
Toying with bower main path to test whether wildcard resolves correctly
prevent close icon style override