phpdocs of actions and improved error msg

Improve 'missing template' message and phpdocs of actions.
Hidden fields in fieldset cancel actions. Fixes #86

When fields were skipped, the $_ret was still false, which cancel the
action without warning.
Improved PHPDocs and visibility of fields
Merge pull request #88 from Klap-in/master

Let closed fieldset submit again & many PHPDocs improvements
Allow @mail@ in emailfield, as placeholder in default value.

Fixes #65.
Added subject field and replyto with @@.

Fixes #7, #17, #31, #38, #44

Refactors some methods of template action to base action class.
Recognizing replyto by @@ (part of previous commit)
Some reformatting, PHPDocs, renaming $data to $fields and

cleanup of return of getTemplates()
PHPDocs and reformat of buildthankyoupage()
rename data to fields in syntax.php
Merge remote-tracking branch 'origin/master' into mailsubjectreplyto
fix thanks messages
fix thanks messages
add <noinclude> pattern, which let you exclude snippets in templates.

Fixes #46
Reformat fieldsets.js
Allow hidden pages as templates. Fixes #47
Merge pull request #89 from splitbrain/mailsubjectreplyto

Add subject and replyto to mail action
Merge branch 'splitbrain/master'
Edit conflicts