Bug 2274 [2/5]: adding MIME::Lite to list of required modules

Bug 2274 [2/5]: adding MIME::Lite to list of required modules

formerly, the overdues cronjobs were crafting their own MIME message attachments (poorly). This
patch adds a dependency on MIME::Lite, the de facto standard perl module for forming usable
emails with MIME attachments. MIME::Lite is pure perl and well supported on numerous platforms:
http://testers.cpan.org/show/MIME-Lite.html

Signed-off-by: Joshua Ferraro <jmf@liblime.com>