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

For people who want to setup the sucssite on another machine.

Push Signup validation changes to beta

They seem to work on my local copy.

Time for public testing.

See merge request !34