6.1.0 modules

Hi Jeff,

started to work on using modules for pfp, using the same mechanism as in the droolsjbpm project. This is heavily WIP (I only introduced one new module - org.mvel - to validate the approach). Can you have a look? 
Note that I deploy pfp as a war now, I dropped the CDI Diagnostics (I think we can include this as a modules as well if we want).

Bernard