Modify class path 

The sample xml is incorrect, because of "class_full_name" is wrong. Most of the classes for data import is under com.era7.bioinfo.bio4j.neo4j.programs folder (verified by extract ExecuteBio4jTool.jar).

I have changed this xml file, also add another database modules.
Merge pull request #7 from leezhenyu/patch-1

Modify class path