Added new assets package for `Bootstrap Timepicker` widget
Corrected wrong generation of HTML IDs for TimePicker.
Pushed the rendering of wrappers around timepicker down from the ActiveForm to TimePicker widget itself.
Marked the widgets which has an end-user documentation page.
Marked the widgets which has an end-user documentation page.
Removed the broken `TbExtendedTooltip` from codebase (too specific, database-bound).
re #511
Merge remote-tracking branch 'origin/master'

Conflicts:
	CHANGELOG.md
	src/components/packages.php