Marking current version as beta, so we can get pre-release on PyPI.

Author: todofixthis

setup.py

@@ -21,7 +21,7 @@
   name        = 'PyOTA',
   description = 'IOTA API library for Python',
   url         = 'https://github.com/iotaledger/iota.lib.py',
-  version     = '2.0.0',
+  version     = '2.0.0b1',
 
   long_description = long_description,