add coveralls webhook (#467)

Fix coverage report

.coveragerc

@@ -1,3 +1,8 @@
+[run]
+omit = */site-packages/plexapi/*
+
+
+
 [report]
 exclude_lines =
     pragma: no cover

.travis.yml

@@ -42,6 +42,10 @@ after_success:
 after_script:
   - '[ -z "${PLEXAPI_AUTH_MYPLEX_USERNAME}" ] || PYTHONPATH="$PWD:$PYTHONPATH" python -u tools/plex-teardowntest.py'
 
+
+notifications:
+  webhooks: https://coveralls.io/webhook
+
 jobs:
   include:
     - python: 3.6