Added hdf4 and hdf5 to requirements, looks like hdf4 didn't take hold.
Merge branch 'issue38' of https://github.com/quintusdias/hdfeos_python_zoo into issue38

Conflicts:
	conda-recipes/gdal/build.sh
	conda-recipes/gdal/meta.yaml
	conda-recipes/gdal/os1_hw.py
	conda-recipes/gdal/run_test.py