fix(typeahead): correctly higlight numeric matches

Fixes #1777
refactor(typeahead): use `ng-if` and `track by` in template

Closes #1722
demo(typeahead): correct demo for asyn results

Fixes #1740
refactor(datepicker): track buttons by date instead of $index
refactor(pagination): move boundary & directions to the template

Closes #795
Closes #1770
feat(alert): add WAI-ARIA markup

Closes #1806
chore(demo): fix fork button width

Closes #1805
fix(datepicker): `Today` button should not set time

Fixes #1726
Closes #1808
refactor(tooltip): remove tt_ prefix