Adding javadocs to driver impl.
Connect maven RepositoryManagerDriver impl with Configuration so we can configure the repo-manager's base url (for formatting repository URLs). Create a new exception type in the repository-manager SPI section to deal with errors that happen in the RepositoryManager, then ripple those up through the layers. Add UrlUtils to help concatenating url parts together...added to common. Add ctor to Configuration to enable slimmer unit tests, then do the same with RepositoryManagerDriver, so we don't have to use weld-se or Arq for simple unit tests. Refactor inter-module dependency declarations so all modules have a managed dep at the top level and we can keep project.version expressions out of the poms.
Merge pull request #32 from jdcasey/master

Connect RepositoryManagerDriver with Configuration from common, and finish implementing.