POM changes I required to get Glimmer to build

I was unable to get Glimmer to build out of the box, and found I had to make some changes to the POM to fix it. 

Some of the changes appear to be due to package naming (mg4j/mg4j-big, owlapi split into owlapi-api and owlapi-apibinding) and so are probably necessary, but others may just be due to my near total lack of familiarity with Maven; in particular, removing scope=provided on the Hadoop dependency. I'm not a Java developer any longer.

I had to guess about the version of mg4j-big, though it built correctly with 5.2.

I used Maven 3.0.4, FWIW.