XD-296
Add external logger config support for gemfire-server
Fixed gemfire-server classpath
Fixed xd-* batch scripts' log4j config path issue
XD-249: Provide a client library for XD REST API

* Added support for REST representations and hypermedia linking
* Added stream deletion
Merge pull request #79 from ericbottard/XD-249

* ericbottard-XD-249:
  XD-249: Provide a client library for XD REST API
XD-248 - Basis of Spring Shell implementation
Merge pull request #80 from ericbottard/XD-248

* ericbottard-XD-248:
  XD-248 - Basis of Spring Shell implementation