Fix Travis-Sauce Connection

Somethings got messed up in the Travis-Sauce tunnel setup.  This should
fix it by re-adding the Sauce credentials.  It also updates the config
to explicitly pass auth information instead of via environment
variables.

.travis.yml

@@ -11,9 +11,11 @@ env:
   - TEST_BROWSER_NAME=firefox TEST_BROWSER_OS='Windows 10,Linux,OS X 10.11'
   - TEST_BROWSER_NAME='internet explorer' TEST_BROWSER_OS='Windows 10'
   - TEST_BROWSER_NAME=safari TEST_BROWSER_OS='OS X 10.11'
-  global:
-  - secure: QE5GqGd2hrpQsIgd8dlv3oRUUHqZayomzzQjNXOB81VQi241uz/ru+3GtBZLB5WLZCq/Gj89vbLnR0LN4ixlmPaWv3/WJQGyDGuRD/vMnccVl+rBUP/Hh2zdYwiISIGcrywNAE+KLus/lyt/ahVgzbaRaDSzrM1HaZFT/rndGck=
-  - secure: g75sdctEwj0hoLW0Y08Tdv8s5scNzplB6a9EtaJ2vJD9S/bK+AsPqbWesGv1UlrFPCWdbV7Vg61vkmoUjcmb5xhqFIjcM9TlYJoKWeOTsOmnQoSIkIq6gMF1k02+LmKInbPgIzrp3m3jluS1qaOs/EzFpDnJp9hWBiAfXa12Jxk=
 before_script: npm install -g karma-cli
 addons:
-  sauce_connect: true
+  sauce_connect:
+    username:
+      secure: "Y5+WRK1ThvctFQNchjW2jly9eLrxe9k8wkKZhS2OGT3SDAmFZnJADswbk/jEbhtl+ZclXybz0uy8Y5YT1PzVCySOqwvy5viIvMZ1xXlOMt1wwJIYbsb3AbOTt3lS+GBXB7RSk0Um5nVx+IMDDIjfS+kQ53NeR1+a/RrDaVNfDEE="
+  jwt:
+    secure: "MHYV2PhoZtNdeSNgRQjLRSn8T9BmwvwBNTgzwOfrUrwU4kVH16ETWOCnygybuRtYC/LNwQxe5W0hcb4rqOzlOO+fWr7OUdRAg8MPXVK0v3WVRu0BpgDIqMXlAbSp2IyCADjqNxG4pmGyrlfAhJ5yO7moaHpjU4QkkXX6QrvjmH4="
+

karma.conf.js

@@ -5,7 +5,8 @@ module.exports = function(config) {
   var browsers = [];
   var useSauce = false;
 
-  if (process.env.SAUCE_USERNAME && process.env.SAUCE_ACCESS_KEY) {
+  // use Sauce when running on Travis
+  if (process.env.TRAVIS_JOB_NUMBER) {
     useSauce = true;
   }