enhancements

[adi130987]

• add autoValidate property/attr
• opened calendar is positioned too low, it should be on the same level with underline
• global auto close event listener
• rename time-picker-lite to something more appropriate (there is no timepicker, it's just a field where you enter time)
• update documentation readme file
• close and clear btns style is confusing (clear btn creates the impression it's a similar with a confirmation btn)