Provide a standalone version of the Dynamap code generator.

[nanreh]

For various reasons, we want a workflow where we can run the Dynamap code generator from the commandline or called from a driver script. Currently, this is difficult because we need to build a classpath for the Dynamap code generator and that involves tracking down many jar files.

Ideally, the mvn artifact for Dynamap would include an application jar version of the code generator so we could simply:

java -jar dynamapcodegen.jar <args>

This would make it easy to integrate into the workflow we're adopting.
thanks!