A simple neo4j desktop app

o Launches one neo4j server database inside the JVM pointing to a database
  of choice.
o Integrated launch4j for building an .exe file of one uber-jar of everything.
o Ability to tweak heap size of the launched JVM (requires restart)
o Ability to tweak database properties (uses <dbDir>/neo4j.properties convention for now).
o Support for server extensions, looks at extensions/*.jar next to
  the run .exe file.
o Also added GUI to configure which packages contain resources, and
  should be mounted by the server.

co-author: LWN, AJ