fix(timepicker): Date object support and other. Related tests.

Timepicker now supports a new type : Date (JS object).
Fixes a bug with default values.
Adds support for all timepicker options in the element.
Adds an override for focus behaviour.
feat(datepicker): ISO string dates support. Related tests.
chore(tests): Fixed a test case for timepicker.
Merge pull request #212 from microcom/pickers

feat(*picker): improve timepicker, datepicker