Don't clean plugins/ folder or config files

Also, if any non-shipped .htaccess files exist, don't clean those either

Fixes #60
Remove placeholder text if found in the draft save

The issue has been filed with Imperavi, but no ticket number or other
tracking information was returned.
Merge pull request #63 from greezybacon/issue/redactor-placeholder-in-draft

Remove placeholder text if found in the draft save

Reviewed-By: Peter Rotich <peter@osticket.com>
Fixup templates to work with Redactor in linebreak mode
Fix oops in htmLawd callback for HTML cleanup
Fix oops in upgrade of %help_topic table

formset_id was not renamed to form_id after our rebase
Merge pull request #72 from greezybacon/issue/templates-in-linebreak-mode

Fixup templates to work with Redactor in line break mode

Reviewed-By: Peter Rotich <peter@osticket.com>
Merge pull request #71 from greezybacon/issue/htmlawed-callback

Fix oops in htmLawd callback for HTML cleanup

Reviewed-By: Peter Rotich <peter@osticket.com>
Merge pull request #70 from greezybacon/issue/upgrade-helptopic-form_id

Fix oops in upgrade of %help_topic table

Reviewed-By: Peter Rotich <peter@osticket.com>
Merge pull request #69 from greezybacon/issue/draft-delete-timing

Await draft deletion before refreshing the page 

Reviewed-By: Peter Rotich <peter@osticket.com>