feat(version): add -dev flag for unversioned releases

This helps clear some confusion on the current version of Deis
users are currently working with.

[skip ci]

Author: Matthew Fisher

client/deis.py

@@ -68,7 +68,7 @@
 import requests
 import yaml
 
-__version__ = '0.12.0'
+__version__ = '0.12.0-dev'
 
 
 locale.setlocale(locale.LC_ALL, '')

client/setup.py

@@ -28,7 +28,7 @@
 
 
 setup(name='deis',
-      version='0.12.0',
+      version='0.12.0-dev',
       license=APACHE_LICENSE,
       description='Command-line Client for Deis, the open PaaS',
       author='OpDemand',

controller/deis/__init__.py

@@ -9,4 +9,4 @@
 from .celery import app  # noqa
 
 
-__version__ = '0.12.0'
+__version__ = '0.12.0-dev'

docs/contributing/releases.rst

@@ -35,6 +35,7 @@ github.com/deis/deis Repo
     * The UI for this is well-hidden: go to https://index.docker.io/builds/ and
       click "Edit".
 - Commit and push the deis/deis release and tag
+    * remove "-dev" from __version__ fields in Python packages
     * ``git commit -a -m 'Updated for vX.Y.Z release.'``
     * ``git push origin release``
     * ``git tag vX.Y.Z``
@@ -51,7 +52,7 @@ github.com/deis/deis Repo
       publically downloadable
 - Switch master to upcoming release
     * ``git checkout master``
-    * update __version__ fields in Python packages to *next* version
+    * update __version__ fields in Python packages to *next* version + "-dev"
     * ``git commit -a -m 'Switch master to vA.B.C.'`` (**next** version)
     * ``git push origin master``