fix reversed hide/unhide basic icons
remove rounding from other corners
fix typo

0.3125em instead of 0.325em
Fixes #712, Modal uses RequestAnimationFrame without doing browser normalization on the event
Fixes #694 A dropdown with numeric content for data-text causes an error on toLowerCase
Dropdown: Adds strict type checking as an option for form selection, allowing for better handling of data-value=0, value='' and other ambiguous values
Fixes #711 selection dropdown does not match input height. Also adds stricter dropdown error css selectors
Fixes #542, use sibling selector instead of adjacent sibling on checkbox rules
Form: Fixes input, dropdown, form field to have consistent sizes and 1em font
Updates docs with examples of dropdown validation, fixes input in menu docs
Fixes #662 inverted icon rendering in OSX
Fixes #336 iOS doesn't render:active classes
Fixes #704, Fixes #421. onShow, onHide callback moved to before transition starts, added new callbacks onVisible and noHidden for after animation completes
Fixes #681, multi line steps, adds two line variation for vertical steps. Fixes all steps to use transform rotote  arrows instead of border arrows for consistency
Merge branch 'css' of https://github.com/MohammadYounes/Semantic-UI

Conflicts:
	src/elements/input.less
Builds version 0.15.0 and updates version number
Updates package.json to hopefully clear up dependency issues on CI
Fixes typo in selection dropdown, causing it to appear incorrectly
Fixes debug statement in dropdown
Release version 0.15.1