Don't use sudo when the target is user is already the current user

Also, improve the current process owner's username
Bump version and update changelog
Add setting to set a custom dir for the workers PID files
Bump version
Strict Error CakeResqueShell
Merge pull request #36 from krazp/master

Pull request for Issue #35
Uses `App::uses` in CakeResqueBootstrap
Fix #25, again