Bug Fixes

> Creating user from panel (open-classifieds/openclassifieds2#935)

Now shows alert "A user with the email you specified already exists" when email is duplicated.

> When Captcha is disabled the field still shows in add new forum post (open-classifieds/openclassifieds2#937)

Now If captcha option is not enabled captcha field not showed on forum/new-topic.html and forum/forum-title/topic-title.html#reply_form