docs(datepicker,timepicker): add styling info
feat(datepicker): add startDate option (fixes #939, fixes #887)
fix(datepicker): allow form submission
feat(popover): add support for customClass option
feat(datepicker): add the ability to disable specific days of the week to the datepicker

Change the date picker to add the ability to choose to disable specific
days of the week.
Adds an option, daysOfWeekDisabled, that is a string with the default
value of '' (empty string).
To disable days of the week, append the appropriate value for the day
of the week that is
desired to be disabled, with 0=Sun, 1=Mon, etc. For example, to disable
Sat and Sun, add the
attribute days-of-week-disabled=06 to the element when using the
datepicker directive.
fix(tooltip): fail-safe destroy (fixes #894)
fix(datepicker): reset minDate and maxDate when set empty string
fix(tooltip): move element blur action to animation.leave() callback

An $apply already in progress exception is thrown when there are other
directives that bind to the element 'blur' event, by executing the blur
event inside the animation callback the DOM event is triggered outside
the angular $digest cycle.

References #750
fix(datepicker, timepicker): only apply touch fixes for whitelisted native devices (fixes #808, fixes #697)
feat(timepicker): option to increment/decrement value on arrow click
fix(timepicker): switch direction
chore(release): cut the v2.0.5 release
docs(dateParser): comment the strange dateParser regression
fix(alert, aside, dropdown, modal, popover, scrollspy, select, timepicker, typeahead): fail-safe destroy
fix(global): fix bsShow string match support
fix(affix): cleans up event listeners when scope is destroyed
chore(affix): make jshint happy
fix(tooltip): stopPropagation when handling ESC keyup event

Without this, using something like typeAhead inside a modal causes expected
behavior when the ESC key is pressed.
Expected behavior: typeahead dismisses and modal remains open.
Actual behavior: typeahead and modal both dismiss (both handle the ESC key).
fix(modal): stopPropagation when handling ESC keyup event
fix(modal, tooltip): only stopPropagation on ESC if $isShown === true