Resolve "add tracability attributes to grid (and maybe tile) files"

Closes #3

gridded_glm/libexec/_minute_gridder.py

@@ -191,7 +191,7 @@ def grid_setup(args, work_dir=os.getcwd()):
 def get_cspp_gglm_version():
     try:
         version_filename = os.path.join(os.getenv('CSPP_GEO_GGLM_HOME'), ".VERSION.txt")
-        return open(version_filename, 'r').read()
+        return open(version_filename, 'r').read().rstrip()
     except:
         return "unknown"