OnEarth v2.8.0

• Added support for DescribeDomains requests, as proposed by the OGC Testbed-12 WMS/WMTS Enhanced Engineering Report. This enables users to request time periods information for a specific layer without needing to request the entire GetCapabilities document, as well as only request time periods that fall within a user-specified range.
• Added support for periods_start, periods_end, limit and skip options for time service requests. See the OnEarth Time Service README for more information.
• The mrf_strict_palette MRFgen option now causes MRFgen to report palette validation failures as errors when set to true and as warnings when set to false.
• Empty <Dimension> elements will no longer be generated in the WMTS GetCapabilities for non-static layers that lack time data.
• Removed obsolete keys from sample endpoint configuration files.
• Added LERC handling block to Apache layer configuration files.
• Dependency updates