Rebase PR #39, #34 & #28

This pull request *should* safely and sanely integrate and rebase the proposed changes from PR #39 #34 and #28 

Additionally, the GNU LESSER GENERAL PUBLIC LICENSE, Version 2.1 has been included.
*see Copyright notice in Code from original jsonrpc author Jan-Klaas Kollhof*

The version number in setup.py has not been incremented although the metadata for license and classifiers have been set accordingly.

The reStructuredText in the README has been adapted to incorporate the original examples and the new information from PR #28. Code examples have been limited to 80 columns.

Please validate and merge at your convenience.

Kind Regards,
-Camisa