[evol] configuration defaults and schema checking (closes 21)
[fix] IMAP: removed buggy rescue
[evol/fix] IMAP: improved error handling and ensure to properly reconnect if appropriate
[evol] don't refetch IMAP capabilities during the same connection
[evol] IMAP IDLE support finished (closes #100)
[fix] repaired IMAP IDLE DONE
[fix] repaired bot stop action
[evol] preliminary IMAP IDLE support (not fully working yet)
[evol] reorganized imap processing
[evol] split IMAP mail checking in several methods and handle errors a bit better
[licence] updated copyright years and added missing headers
[cleanup] split 'lib/cyborghood/base.rb' and reorganized requires a bit
[debug] simplify debug with debug flags, added one to allow not removing mails in the mailbox (to replay them later)
[cleanup] better class/modules names for a few items
[evol] add missing licensing terms
[evol] check new mails at a selectable minimum interval, and handle stop requests gracefully
[evol] improved IMAP message handling, and properly delete ignored or processed messages
[evol] move IMAP code into a new class