Release 0.8.3

This version has a major fix regarding merging of VIIRS data. Do not use
any previous version for VIIRS merges.

setup.py

@@ -5,7 +5,7 @@ setup(
     author='Bruce Flynn',
     author_email='brucef@ssec.wisc.edu',
     description='Utilities for working with EDOS L0 PDS files',
-    version='0.9.dev',
+    version='0.8.3',
     zip_safe=False,
     packages=find_packages(),
     pyver=True,