Bump copyright to 2013
Whitespace
Implement a Cluster of Gofers
Implement a test for the threading race
Merge pull request #2 from richo/misc/bump_all_the_things

misc cleanups
Add README section on Cluster
Merge branch 'features/cluster' of git://github.com/richo/gofer into richo-features/cluster

Conflicts:
	README.md
Add .ruby-version to .gitignore
Tidy up syntax highlighting on README
Bump version
Output prefixes.
Speed up tests by using ruby to do a sub-second sleep for concurrency tests
DRY concurrency tests a bit
Add note re contributions
Be slightly intelligent about prefixing newlines on output
Bring HISTORY.md up to date
Rename HISTORY to the more common CHANGELOG
Update TODO & remove planned features
Support Cluster#run_once
Merge pull request #3 from richo/features/run_once

Support Cluster#run_once