Update with resque 2 info

- Added @PaulSchuher as contributor
Update ext.rb
Whitespace
Spec Resque::Job#reserve for v2 changes
Initial pass at Resque 2.0 support

- resque_scheduler does not support 2.0
- Resque#reserve has moved to Resque::Job

TODO Cleanly separate scheduler specs
Update ext.rb
Fixing failed spec