Reduced user error

Postcodes can now be lowercase and lack a space.
Phone numbers must be at least 10 characters long (increased from 1, shouldn't cause any issues?).
Any email containing "@sucs." is not allowed for signup.
signup.js has been reformatted.

See merge request !33

Fix addresses not to being inserted into the textarea with line breaks

See merge request !30

Use the built in sucs-site error handling stuff.

See merge request !29

Conflicts:
	templates/susignup-admin.tpl

Send people to the maintained games.sucs.org instead of taking them to /games Closes #19

Change the top level menu link to send people to games.sucsorg instead of /games

See merge request !26

when the click on the menu link.

Implement the new SU API Closes #5

See merge request !25

Merge branch 'suapiv2' of projects.sucs.org:imranh/sucs-site into suapiv2

Also change the way messages are flashed to the user.