Fix to update_col to use $model->getTmpl() instead of $this->tmpl.
Added some HTML helper functions for email template stuff we've been
duplicating in plugins.
Added Which Elements option to CSV export, for hands off export. 
Selects whether to export All, Visible, or Selected (chosen in popup)
added nvd3 chart viz - advanced users only please
Merge branch 'master' of github.com:Fabrik/fabrik
merge master