Change backupDir to fix failing tests on Jenkins.
Add doc to TopologySetUpTest.
Rename TopologySetUpTest -> TopologySetupTest.
Merge pull request #10 from agouge/fix-jenkins-tests

Fix jenkins tests
Merge branch 'master' into GH

Conflicts:
	src/test/java/org/gdms/gdmstopology/TopologySetupTest.java
	src/test/java/org/gdms/gdmstopology/function/CentralityTest.java

Deleted CentralityTest.java.