Add module and config for hashing passwords.
Update Site code to use the new SiteCryptModule.
Self init the crypt module. Add sane defaults.
Add dependency to crypt and update copyright year.
Simplify.
Use our convention for checking for empty strings.
Remove prefix. Add comment. Update method.
Merge pull request #44 from charleswaddell/update-password-hashing

Update Site password hashing