Todo:
 - Need to add reply/forward functionality
 - Look into SMTP attachments & format
 - Need to add a user.keys file with a list of accepted pub keys and notify if modified (add/mod/del entries in contacts)
 - Use bootstrap js for nicer looking forms/tables (also more/better icons)
 - Implement secure trash delete/restore
 - Protocol description text/pictures/proof-of-work
 - define a standard regex across all scripts (js/php/python/etc...) for email address formats