This commit introduces 3 queues for sidekiq
"critical" for urgent jobs (weighted at 4x weight)
"default" for standard jobs(weighted at 2x weight)
"low" for less important jobs
"critical jobs"
Reset Password emails has been seperated to its own job
Heartbeat which is required to keep sidekiq running
Test email which needs to return real quick
"low priority jobs"
Notify mailing list
Pull hotlinked images
Update gravatar
"default"
All the rest
Note: for people running sidekiq from command line use
bin/sidekiq -q critical,4 -q default,2 -q low
As it stands we load up user records quite frequently on the topic pages,
this in turn pulls all the columns for the users being selected, just to
discard them after they are loaded
New structure keeps all options in a discrete table, this is better organised
and allows us to easily add more column without worrying about bloating the
user table
