Added ConstantTile writing through ArgWriter.

 - Refactored Geotools GeoTiff reader, moved the Reader and Writer stuff to ascii, since that's the only format still using that architecture.
Merge remote-tracking branch 'upstream/master' into write-constant-raster
Fixed gdal test
expect on gdal.jar to be present in 'gdal/lib'
HdfsUtils can create temp files and copy files to local
added GDAL InputFormat for Hadoop

has a lot of caveats, but still useful
GdalInputFormat exposes more data in key
Conflicts:
	project/Build.scala
added GDAL InputFormat for Hadoop
GdalInputFormat exposes more data in key
returning function values in Ingest consistent with scala style guide
Renamed RasterRDD to TmsRasterRDD

As it can only carry TmsTiles
add RasterRDD, generic on index
fix: Pyramid only applies to TmsRasterRDD
Merge remote-tracking branch 'upstream/master' into write-constant-raster
Fixed GDAL test
renamed "root" project to "geotrellis".
spark project depends on gdal for NetCDF reading
CellSize gains overload to accept cols,rows as a tuple
Reproject will short-circuit if source and target CRS are the same