Update zp-core/zp-extensions/comment_form/functions.php

Fixed  #198
Added redirect to comment posted #195
Update zp-core/zp-extensions/comment_form/comment_form.php

Redirect to error message #195
Update zp-core/zp-extensions/comment_form/functions.php

Comments added to changes, marked as bic-ed to be easily found and deleted/changed
Update zp-core/zp-extensions/comment_form/functions.php
Merge pull request #201 from bic-ed/master

Comment form plugin: fix #198 and enhancement #195 (not for html cleanup)