Move 1.8-alpha out of 'expected failures'

Author: tomchristie

.travis.yml

@@ -33,10 +33,6 @@ env:
 matrix:
   fast_finish: true
   allow_failures:
-    - env: TOX_ENV=py34-django18alpha
-    - env: TOX_ENV=py33-django18alpha
-    - env: TOX_ENV=py32-django18alpha
-    - env: TOX_ENV=py27-django18alpha
     - env: TOX_ENV=py34-djangomaster
     - env: TOX_ENV=py33-djangomaster
     - env: TOX_ENV=py32-djangomaster