Update read_meta.py

Now, only the EPSG identifier and the zone is read from the metadata file. The file is converted to the Daymet projection, then gdalinfo is called on the generated file. The upper left and lower right coordinates are parsed from gdalinfo's output. Right now, it returns the x/y coordinates, but gdalinfo also returns the coordinates in degrees. 

The plan is to use gdal_translate -srcwin or -projwin to break the initial file into smaller pieces. -srcwin uses x/y, -projwin uses georeferenced coordinates. I haven't figured out what size is appropriate for generating the smaller pieces.