alpha3 version bump, to test numpy install inclusion

Author: abrammer

setup.py

@@ -153,7 +153,7 @@ def _use_hdf4alt(libdirs):
       license      = 'MIT',
       long_description = "\n".join(DOCLINES[2:]),
       url          = 'https://github.com/fhs/pyhdf',
-      version      = '0.10.3-alpha.2',
+      version      = '0.10.3-alpha.3',
       packages     = ['pyhdf'],
       ext_modules  = [_hdfext],
       data_files   = data_files,