[IMP] website: create customize theme application and color-picker; Create theme_bootswatch and use less files.
don't auto delete my mass_mailing e-mails after sending them out.
because they need to be exists when the opened mark arrives back, and i
want to be able to see back what e-mail i sended out exactly.
don't allow to delete the mail what have a reference from the
statistics, because than the mail ID will nulled, and the "client opened
mark" won't work.