the backend code has been added back in, and the build process has been
modified so that no output files are left outside of build/. Admin page
loads and logs in correctly, nothing else functionality-wise yet.
web UI now uses modules, and relies less on bodge to make things work.
Also fixes an issue where invites where "failed to send to xx" appeared
in invite form.
requirement strings
Password requirement text is now loaded by the typescript, and can be
customized by changing the validationStrings variable. See wiki for more
info.
The invite route no longer calls checkInvite, instead just chekcing the
invite exists. This speeds up page loading. the 404 and invalidCode
pages are now loaded when necessary.