feat(typeahead): support the editable property

Closes #269
fix(dialog): set _open to false on init
refactor(dropdownToggle): cleanup code and increase legibility
chore(build): Make test-config not autoWatch, speed up grunt watch task
fix(alert): don't show close button if no close callback specified
fix(collapse): remove reference to msTransition for IE10

In IE10 msTransition exists but msTransitionEnd never fires. IE10 does however support standard transitionend.
Since IE<10 does not support transitions this line can be removed entirely.

This has already been done in Twitter Bootstrap. Reference here: https://github.com/twitter/bootstrap/pull/4166
docs(dialog): corrected resolve example
demo(accordion): minor demo changes
demo(accordion): fix typo in demo's readme
Merge branch 'master' of https://github.com/angular-ui/bootstrap into ie8-compatibility