Relates to issue #62.  Updated PluginDescriptor.java to read new XML format.  This is not yet final: the "Type" enum at the top of this file should be edited to reflect the allowed plugin types/categories
Deleted some debug code from PluginDescriptor.java
Merge branch 'master' of https://github.com/compbio-UofT/medsavant

Conflicts:
	MedSavantClient/src/main/java/org/ut/biolab/medsavant/client/plugin/AppDescriptor.java