Travis: Move RUN_LIVE_TESTS to Django 1.10

[ci skip]

.travis.yml

@@ -6,7 +6,7 @@ matrix:
     # https://docs.djangoproject.com/en/dev/faq/install/#what-python-version-can-i-use-with-django
 
     # Live API integration tests are only run on a few, representative Python/Django version
-    # cominbations, to avoid rapidly consuming the testing accounts' entire send allotments.
+    # combinations, to avoid rapidly consuming the testing accounts' entire send allotments.
 
     # Django 1.8: Python 2.7, 3.2 (until the end of 2016), 3.3, 3.4, 3.5
     - { env: DJANGO=django==1.8 RUN_LIVE_TESTS=true, python: 2.7 }
@@ -17,13 +17,15 @@ matrix:
     # Django 1.9: Python 2.7, 3.4, 3.5
     - { env: DJANGO=django==1.9, python: 2.7 }
     - { env: DJANGO=django==1.9, python: 3.4 }
-    - { env: DJANGO=django==1.9 RUN_LIVE_TESTS=true, python: 3.5 }
+    - { env: DJANGO=django==1.9, python: 3.5 }
     - { env: DJANGO=django==1.9, python: pypy }
     # Django 1.10: Python 2.7, 3.4, 3.5
     - { env: DJANGO=django==1.10, python: 2.7 }
     - { env: DJANGO=django==1.10, python: 3.4 }
     - { env: DJANGO=django==1.10 RUN_LIVE_TESTS=true, python: 3.5 }
     - { env: DJANGO=django==1.10, python: pypy }
+    # Django 1.11 (prerelease): Python ???
+    #- { env: DJANGO="--pre django", python: ??? }
 cache:
   directories:
     - $HOME/.cache/pip