[GEOS-5993] Missing ElectronicMailAddress in WFS capabilities

In the WFS capabilities there were missing two important fields that are
present in the XSD. Those fields are ElectronicMailAddress and
DeliveryPoint.

This commit adds those two fields, but disregards the fact that there
can be more than one of both fields. However this patch could be adapted
to create a List or Array of both, so they are more faithful to the XSD.
[GEOS-5993] Added a test in the WFS Capabilities Transformer test for Contact information added to WFS.
[GEOS-5993] Added GUI support for DeliveryPoint and ElectronicMailAddress.
Implemented hashCode and equals methods.
Updated SLD cookbook 3-color gradient to match current behavior
Fix data directory path example for Linux

See http://docs.geoserver.org/latest/en/user/datadirectory/data-dir-creating.html for how this gets rendered.
[GEOS-6785]WCS GetCapabilities 1.1.1 has invalid metadataType attribute

WCS GetCapabilities request had a metadataType attribute which isn't allowed according to the XSD (owsCommon 1.1.1). Thus I have removed this item from being generated.
Fixing progress report for triple nested processes
Fix copyright in xml files

Sorry I missed this the first time out.
Update instructions for running with Java 7 JRE
Update license contact details for OSGeo
highlight github quickfix
update license information in developer guide
Use release license files for user docs.
Update tools for Java 7, Git and Maven
Fix broken test on app-schema
Merge pull request #831 from bradh/patch-4

Fix data directory path example for Linux
fix copyright in conf.py files
Fix a few headers that got left out in the cold
[GEOS-6764] Ability to cancel/dismiss asynchronous WPS processes still executing in the server