Karma reasons

[zmughal]

Support the syntax for karma:

nick++ # reason

[mattdees]

Should this be stored in the DB? I see it being possible, but also a pain in the ass (as I'd then have to index all of the karma)

[mattdees]

Implementation:

add karma_id to Karma schema
has_many reasons

reasons table:

karma_id int,
operation enum(inc, dec),
reason varchar 160

on !reason $karma_key

select three random reasons for karma_id that have inc, another three for karma_id that have dec, return to channel.