Temporary fix for GEOS-5353

Intermittent build failure in ServiceAccessRulePageTest
Adding 2.0.1 as a possible version... static init of versions, ugh, yet making a dynamic lookup seems sort of impossible in the service loader
Some amendments to make wcs 2.0 cite tests work against a 2.0.1 version
Use canonical schema locations for the moment, add the xml profile
Clarifications to User Guide Labelling section
Add support for custom dimensions.
Add units attribute for validation purposes.

For now this is hard-coded to be empty, as code to make it configurable would conflict with the pending elevation units patch. This can be changed as soon as that patch is accepted.
Confine DIM_ prefix processing to core WMS handling code, so that the reader and other protocols use the original (unprefixed) dimension name.
Adapting custom dimension work to Dec 2012 trunk code
Adding GUI for custom raster dimensions, and handling units and unit symbols
Support for WCS 2.0 GeoTiff encodining params and fix the mime type
Adding support for the GML grid output format
Disabling a test that keeps on breaking the build. The catalog subsystem is not thread safe, a test for concurrent modification is pointless and bound to fail
Adding a prefix for custom dimensions in the metadata map to avoid collisions with other params in the metadata map
WCS2.0: fixes and changes for CITE compliance
Minor improvement to the USER doc about the Geoserver Data Directory
Merge pull request #78 from dromagnoli/master

add a reference to the Geoserver Data Directory from the Windows installation page
GSIP 82, reworking filter chains including the GUI
CAS based on GSIP-82
Temporary fix for GEOS-5353

Intermittent build failure in ServiceAccessRulePageTest