Move polyglot-core and polyglot-web to be first-class JBoss modules.

Conflicts:
	modules/core/pom.xml
	modules/web/pom.xml
Mix in more dependencies.
Only install the services if we haven't already.

TorqueBox and Immutant both use this processor, and both key off of
the presence of ApplicationMetaData. Now that -core is a module, the
ApplicationMetaData class is only loaded once, so the processor can
fire twice in an overlay type siuation.
Cache and HASingleton modules don't need to bring their own Core jars.
Even less jar duplication.
Rev stilts.

Conflicts:
	pom.xml
Make the underlying web session accessible.
GenericSubsystemDescribeHandler belongs under modules/core as well
Move AtRuntimeInstaller to the core module.

And get rid of core-extensions, since it's no longer needed.

Conflicts:
	core-extensions/pom.xml