Add new documention about forms
	modified:   _config.yml
	modified:   en/documentation/form/action.md
	new file:   en/documentation/form/controller.md
	modified:   en/documentation/form/index.md
	modified:   en/documentation/form/template.md
Add collection doc
	modified:   en/documentation/form/template.md
Merge pull request #88 from lovenunu/form

Add new documention about forms