Fix docstring for supervisor.getState().  Closes #344
Add contributor agreement.
Update CONTRIBUTORS.txt
Signature for the contributors agreement
Added my name to CONTRIBUTORS.txt
Sign the contributors license agreement.
Fix the project name in CONTRIBUTORS.txt.
Merge pull request #348 from sagikazarmark/patch-2

Update CONTRIBUTORS.txt
Merge MJPs signature.
Merge MKs signature.
Add myself to CONTRIBUTORS.txt as requested
Merge tsuna's signature.
Update CONTRIBUTORS.txt.
Merge pull request #352 from gthb/patch-2

Add myself to CONTRIBUTORS.txt as requested
Merge pull request #353 from vanzin/master

Update CONTRIBUTORS.txt.