GIBS-528: Updated to GDAL version 1.11.0 and verified that it is working via MapServer
Merge pull request #21 from mike-mcgann/gdal-1.11

GIBS-528: Updated to GDAL version 1.11.0
Added check for output files before attempting move.
Added handling for relative directory paths in configuration file.
GIBS-466 Updated script support for transparency
Fixed issue with mrf_insert being called unnecessarily.
GIBS-466 Merged code with added error handling and return codes
GIBS-386 More error reporting, captured exit code and errors from
RGBApng2Palpng
GIBS-466 Fixed issue with incorrect colors in imagery with transparency
Added error handling for empty tiles and clean-up of cycle time file
#22 GIBS-370 Added basic tests for mrfgen
Updated version numbers and added noreplace options to onearth spec.
Updated mod_onearth version.
GIBS-470 Added filter to remove bad JPEGs from list of tiles
#22 GIBS-370 Modified tests for mrfgen, now includes polar projection
GIBS-470 Error handling added for bad JPEG tile detection
#22 GIBS-370 Added tests for layer config tool
Fixed bug with mrfgen marking .mrf files as bad JPEG
GIBS-543 Adding correct black JPEG file.