Replace all the addslashes with parameterised queries, and attempt to spot anywhere else that failed to escape queries properly

Removing the SUCS Blogs system and Planet. Security flaws, not used, old code. http://lists.sucs.org/pipermail/devel/2015-January/000103.html

M    news.tpl

M    templates/susignup.tpl
M    templates/societies.tpl

Allows staff to start sign up process for students who have paid but not yet signed up, including those who don't have their SU transaction ID.

Should coexist peacefully with existing signup system and the new SU signup component

Added initial version of SU API implementation for freshers fayre, still needs error checking adding, though now ready for testing, improvements welcome.

Allow admins to remove unrequested junk items, no questions asked. (plus a little extra error handling)