Form scanning

* Added DOM scanning for forms
Form element -> form container

* Renamed form element to container (more precise)
Form, allow not using comm

* Form can be sent standard way (not imitating ajax)
Form, pass data object

* Form container passes correctly data object to all elements
Date/Time inputs, values and etc
Form, initial check

* Checks values right after form creation
Input, is_valid

* Input calls is_valid only for nonnull values
Time input, validation

* Simplified time input validation
Date input validation

* Added perfect date input validation
Version bump