Fixing a bug with landsat bin script

bin/landsat

@@ -10,4 +10,4 @@
 import landsat.landsat
 
 if __name__ == '__main__':
-    landsat.landsat.main()
+    landsat.landsat.__main__()

landsat/landsat.py

@@ -217,8 +217,12 @@ def package_installed(package):
         return False
 
 
-if __name__ == "__main__":
-
+def __main__():
+    global parser
     parser = define_options()
     (options, args) = parser.parse_args()
     main(options, args)
+
+if __name__ == "__main__":
+    __main__()
+