refactor(button): remove inner-element, replace instead
fix(pagination): while tabs element is hidden, always disable pagination
refactor(aria): add expectAsync
chore(): remove default-theme from version control
style(dialog): fix spacing
test(slider): add one more test
refactor(button): manually pass disabled attr
docs(dialog): remove whitespace
fix(sidenav): make z-index be below bottomSheet

Fixes #555
style(): remove empty md-whiteframe selector
Merge branch 'master' of https://github.com/angular/material

Conflicts:
	docs/app/css/style.css
	src/components/button/button.js
	src/components/button/button.spec.js
	src/components/tabs/demoDynamicTabs/style.css
	src/components/tabs/js/tabItemDirective.js
	src/components/tooltip/demoBasicUsage/style.css
	src/services/aria/aria.js