Change :valid hack to class not-empty for inputs (also add email type) #55
Fix textarea placeholder focus exception
Change class name mui-input-not-empty to mui-is-not-empty
change class concatenation to classSet
Merge branch 'master' into issue-55-make-class-instead-valid

Conflicts:
	src/less/components/input.less
Merge pull request #170 from ButuzGOL/issue-55-make-class-instead-valid

Change :valid hack to class not-empty for inputs (also add email type)