XD-195 Make the time Source Emit String by Default

Add an option `--asString` (default true), allowing
override.
XD-179,180,181,182,183,184: Single Node Server

This addresses the Epic - support switch between local and distributed processing nodes.
Merge pull request #48 from dturanski/XD-179b

* XD-179b:
  XD-179,180,181,182,183,184: Single Node Server
Give xd-singlenode executable perms
XD-202 added temporary twitter search source
Merge pull request #50 from markfisher/XD-202

XD-202 added temporary twitter search source
XD-201
Fix XD .bat scripts to use wildcard classpath(supported from java 1.6)