html class: created submodule for datetime methods and moved them
common tags cloud moved into submodule
common funcs: added unified _attrs(), used by form(), table(), html()
table unification with _attrs()
form: unified with function _attrs()
common: moved tags cloud and html_controls, overall cleanup
html class merged with html_controls, overall cleanup
form tbl_funcs sync with _attrs()
deleted html_controls class, contents merged into html
unit tests for form updated