Clean up the global scope
Use the default (utf8) encoding for Buffers
Gearman sends two packets for NO_JOB as one, some times, it seems
Updated job management
Version bump
Updated README.md to include required Node.JS version
Merge remote-tracking branch 'enmand/master'
Avoid extending Object prototype

Extending Object adds a key/value pair to every Object instance, which may cause
problems if any code is looping through an Object.  Closes #11.