set versions for release candidate

Author: mbmilligan

requirements.txt

@@ -0,0 +1 @@
+jupyterhub>=0.5

version.py

@@ -3,11 +3,9 @@
 
 version_info = (
     0,
+    8,
     0,
-    1,
-    'dev', # comment-out this line for a release
+    'rc0', # comment-out this line for a release
 )
-__version__ = '.'.join(map(str, version_info[:3]))
+__version__ = '.'.join(map(str, version_info))
 
-if len(version_info) > 3:
-    __version__ = '%s-%s' % (__version__, version_info[3])