Merge pull request #868 from strzalek/resque-web-leftovers

Remove resque-web leftovers
Remove rake tasks
Add thor
Backport rake resque:work to thor
Add simple config class

I'd like to move methods like #redis=() there, later on
Resque task has been removed
Add config option & handle worker setup
Port tasks from old bin/resque
Remove config, add --require option
Remove rake task from generator, simplify initializer
Use shortcut
Comment out verbose options for now