XD-1011 shell command now supports --host --port

User can now use --host --port on the command line of the XD Shell
For Example: 
* xd-shell 
* xd-shell --host ec2-50-16-24-31.compute-1.amazonaws.com --port 9350
* xd-shell --host ec2-50-16-24-31.compute-1.amazonaws.com 
* xd-shell --port 9350
Added validation for command line params.

Updated Scripts to use XDBootstrap