Remove python-hdf4 dependency

setup.py

@@ -7,7 +7,7 @@ setup(name='InterCal',
       url='http://tahiti.ssec.wisc.edu/trac/intercal',
       packages=find_packages(),
       package_data={'': ['data/srfs/*/*']},
-      install_requires=['numpy', 'h5py', 'python-hdf4'],
+      install_requires=['numpy', 'h5py'],
       entry_points={'console_scripts':[
           'cris_tar2h5 = intercal.cris_tar2h5:main',
           'intercal_sno = intercal.sno:main',