Convert cglib to be a maven project

Initial basis to convert cglib to be a maven project, I suspect there would be further work needed to ensure this work correctly but hopefully helps.

- Two tests were disabled for now since they relied on a signed jar file.
- Maven needs to be updated to generate sources/javadoc jar files
not necessary for now, but it'd be nifty if we could extract the parts of cglib that depend on asm-util out to a separate project, since i'm pretty sure not everything actually needs -util, just some specific bits of cglib.  though maybe more complication than is worth it.