Update send.gdoc

Adding exchange as parameter and used different routing key to make documentation clearer
Update send.gdoc
Update rpcsend.gdoc

Adding exchange as parameter and used different routing key to make documentation clearer
Merge pull request #33 from marcDeSantis/publish-docs

Publish docs
Adding converter for GString, and updated copyright notices.
Updated changelog for release.
Fix a couple issues with new GString converter.
Release 2.0.6