GeoPackage support

GeoPackage support requires the ossim library, and two ossim plugin, sqlite and png.:

ossim library: [​http://trac.osgeo.org/ossim/browser/trunk/ossim

sqlite plugin: ​http://trac.osgeo.org/ossim/browser/trunk/ossim_plugins/sqlite

png plugin: ​http://trac.osgeo.org/ossim/browser/trunk/ossim_plugins/png

To get via svn:

svn co http://svn.osgeo.org/ossim/trunk/ossim ossim
svn co http://svn.osgeo.org/ossim/trunk/ossim_plugins/sqlite sqlite
svn co http://svn.osgeo.org/ossim/trunk/ossim_plugins/png png

Note additional plugins may be required for input data, e.g. ossim kakadu plugin for j2k data.