Add version 7 to protocols

Author: dcramer

CHANGES

@@ -13,6 +13,8 @@ Version 7.7.0
 - Added celery app version check.
 - Added queue overview to internal administration.
 - Upped TSDB's storage of 10s to 60m of data.
+- Added protocol version 7 to client spec.
+  - Adds 'fingerprint' attribute.
 
 Version 7.6.2
 -------------

src/sentry/web/api.py

@@ -64,7 +64,7 @@
 # See http://probablyprogramming.com/2009/03/15/the-tiniest-gif-ever
 PIXEL = 'R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs='.decode('base64')
 
-PROTOCOL_VERSIONS = frozenset(('2.0', '3', '4', '5', '6'))
+PROTOCOL_VERSIONS = frozenset(('2.0', '3', '4', '5', '6', '7'))
 
 
 def api(func):