Fix #706 add method addAt for \Phalcon\Forms\Form
Replace Phalcon\Tag::
Merge \Phalcon\Forms\Form::addAt to \Phalcon\Forms\Form::add
Finally fix #1379
Merge pull request #1386 from dreamsxin/form

Fix #706 add method addAt for \Phalcon\Forms\Form
Merge pull request #1387 from xboston/patch-1

Replace Phalcon\Tag::
Merge pull request #1389 from sjinks/issue-1379

Fix #1379 completely