update version to 0.2.dev1 in master
diff --git a/cryptography/__about__.py b/cryptography/__about__.py
index 95f8574..aa1878d 100644
--- a/cryptography/__about__.py
+++ b/cryptography/__about__.py
@@ -22,7 +22,7 @@
                "recipes and primitives to Python developers.")
 __uri__ = "https://github.com/pyca/cryptography"
 
-__version__ = "0.1"
+__version__ = "0.2.dev1"
 
 __author__ = ("Alex Gaynor, Hynek Schlawack, Donald Stufft, "
               "Laurens Van Houtven, Jean-Paul Calderone, Christian Heimes, "