[JiBX DataBinding] Code generation API

[Dennis Sosnoski]

I've restructured the JiBX code generation from schema to make it easier 
to use from other tools. Nilupa, you should be able to use this to 
integrate JiBX code and binding generation in with CXF's code generation 
from WSDL.

JiBX code generation still uses the org.jibx.schema.codegen.CodeGen 
class, but no longer assumes command line usage. The guts of the core 
generation have been moved into the static generate() method, which 
takes a pair of interfaces and a list of schema resolvers as input. The 
first interface is to provide code generation parameters, the second is 
to handle reporting of problems and status information during 
generation. The list of schema resolvers provides the means for the code 
generation to get at the actual schemas - in normal generation these are 
generally coming from the file system or internet and use 
org.jibx.schema.UrlResolver instances, but for working from WSDL you may 
need to work with embedded schemas which can be handled using 
org.jibx.schema.MemoryResolver.

It'll probably be next week before I can release JiBX 1.2.3 including 
these changes, but I've uploaded the latest SNAPSHOT jars to the maven1 
repository if you want to try them out. You can get the source code from 
the JiBX CVS on SourceForge.

 - Dennis