Open Juno development

Bump preversion to 2014.2 to formally open Juno development.
The Icehouse release branch (milestone-proposed) will be cut
from the last commit before this one.

Change-Id: I098875288a7090de75110166b72cc00181ff278c

Author: ttx

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = horizon
-version = 2014.1
+version = 2014.2
 summary = OpenStack Dashboard
 description-file =
     README.rst