Merge from PHP integration branch
Improved the extension points to supply context help ID
Added the context help IDs
Added the context help for the axis generators
Fixed the namespace location of the schema
completed the extension with the new optional attributes
Improved the logging facilities to fix #65
Simplified the generation of the SQLs
Fixed the generation of the getConnection method and adding it to the code. This is part of #70
Added the code to implement the methods from interfaces or super classes