Update gdms-topology  (remove unused dependencies and  methods)
Waiting Adam changes
Fix pom and a bug with the shortestpath function
Fix demo test
Clean up
Change for adam +4
Merge pull request #12 from ebocher/topology_fixshortestpath

Fix ST_ShortestPath and git rid of ST_ClosenessCentrality and jgrapht-sna dependency.
Fix where SP metadata comes from.
Merge branch 'master' into GH

I delete DemoCentralityIndices as in c062d0382db. I also keep
ST_GraphAnalysis in the Activator and lower the version of OSGi from
5.0.0 to 4.3.1.

In the next commit, I'll restore the version of ST_ShortestPath written
by Erwan that he just fixed in c062d0382db.

Conflicts:
	pom.xml
	src/main/java/org/gdms/gdmstopology/Activator.java
	src/main/java/org/gdms/gdmstopology/demo/DemoCentralityIndices.java
	src/main/java/org/gdms/gdmstopology/function/ST_ShortestPath.java
Restor Erwan's version of ST_ShortestPath.

I had written a different version of this function that didn't quite
work correctly. I would like to refactor this function later to make it
easier to read and debug.