demo(datepicker): add type attribute to buttons

Closes #1890
Closes #1894
chore(ci): switch off IE testing on TravisCI
fix(typeahead): loading callback updates after blur

Fixes #1822
Closes #1904
test(pagination): clean some injections

Closes #1895
feat(dropdown): focus toggle element when opening or closing with Esc`

 * Improve accessibility.

Closes #1908.
fix(timepicker): evaluate correctly the `readonly-input` attribute

Closes #1911
fix(karma): exclude demo files

Closes #1889