[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
[GEOS-6779]: Fixing NetCDF WCS request after fix made with GEOS-6757
Update grib.rst
Merge pull request #829 from bradh/patch-3

Update grib.rst
Merge pull request #825 from dromagnoli/GEOS-6779

[GEOS-6779]: Fixing NetCDF WCS request after fix made with GEOS-6757
[GEOS-6783]: Fixing imageLayout on coverageViewReader
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.
Merge pull request #830 from dromagnoli/GEOS-6783

[GEOS-6783]: Fixing imageLayout on coverageViewReader
Update Page Header for 2.7
Merge pull request #820 from smithkm/master

Update Page Header to reflect version
[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