Updated the sleeper task to register a logger
Renamed Worker to ForkingWorker
Changed all references from Worker to ForkingWorker
Factory method for creating workers
Using attrs instead of i_vars
Renamed ForkingWorker to Worker
Implemented two execution strategies
Making the master use execution strategies
Bumped version
Correct instantiation of execution strategy
Longer sleep period
Telling that the stop_all has timed out
Renamed methods in master
Refactored master spec to use expect/allow
Should was refactored to expect
Describing execution_strategy
Requiring the execution strategies