Update and fix documentation for cluster point process generation

[stiber]

Graphitti/Tools/InputGeneration/README.md

Lines 40 to 60 in 868a369

	The developer's documentation contains more information about the [simulation input file
	format and the class that loads and manages the event inputs]
	(https://uwb-biocomputing.github.io/Graphitti/Developer/GraphAndEventInputs.html).
	Below is an example of a simulation input file:
	```XML
	?xml version='1.0' encoding='UTF-8'?>
	<simulator_inputs>
	<data description="SPD Calls - Cluster Point Process" clock_tick_size="1" clock_tick_unit="sec">
	<vertex id="194" name="SEATTLE PD Caller region">
	<event time="12" duration="568" x="-122.43656117361931" y="47.604800151342786" type="Law" vertex_id="194"/>
	<event time="99" duration="36" x="-122.43611438152655" y="47.5321990385178" type="EMS" vertex_id="194"/>
	<event time="336" duration="100" x="-122.34868883298704" y="47.56973909330686" type="Law" vertex_id="194"/>
	<event time="601" duration="367" x="-122.44122311134316" y="47.70298531339788" type="Law" vertex_id="194"/>
	<event time="766" duration="96" x="-122.28084792007573" y="47.70594997190379" type="Fire" vertex_id="194"/>
	...
	</vertex>
	</data>
	</simulator_inputs>

In the above documentation, the hyperlink isn't formatted right and the data file example must be from an early version of the code.

[stiber]

Also, the linked GitHub pages file has an old example data file in it.