Add XMP APP1 parser for jpeg images.

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Have jpeg data with embedded XMP APP1 block with aircraft positioning data. Need to parse get corner points to geoposition.

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1) Added ossimXmpInfo class with code to parse xmp app1 block from jpeg image.

2) Added ossimXmpInfo::getProjection to grab corners from the parsed xml block and make an ossimBilinearProjection.

3) Added ossimJpegTileSource::getImageGeometry to return projection if found.

Above code allows data to be geopostioned on Earth with corners using a simple bilinear projection.

Note: This is NOT a rigorous model; you cannot do image space exploitation.

Affected files:

ossim/src/ossim/support_data/ossimInfoFactory.cpp
ossim/src/ossim/support_data/ossimXmpInfo.cpp
ossim/include/ossim/support_data/ossimXmpInfo.h
ossim/src/ossim/imaging/ossimJpegTileSource.cpp
ossim/include/ossim/imaging/ossimJpegTileSource.h

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TRAC links (two commits):

​http://trac.osgeo.org/ossim/changeset/22118/trunk/ossim

​http://trac.osgeo.org/ossim/changeset/22117/trunk/ossim