Autosaving thread data

It will autosave all the elements with class `sf_autosave` as post meta
with key `_sf_autosave_$element_id`. Currenly it autosave cc, bcc and reply box.

Currently it don't support autosave functionality in new threads
Sending element ID rather than name during autosave
Corrected WP coding standard
Auto save also new tickets
Enable autosave for post title and respondents in draft tickets only
Merge pull request #138 from VarunAgw/auto-save

Autosaving thread data