Correctly declare environment variables.

.travis.yml

@@ -10,10 +10,10 @@ deploy:
         branch: master
 env:
   global:
-  - ENCRYPTION_LABEL: "b5c2730599da"
+  - ENCRYPTION_LABEL="b5c2730599da"
-  - COMMIT_AUTHOR_EMAIL: "chris@ethereum.org"
+  - COMMIT_AUTHOR_EMAIL="chris@ethereum.org"
-  - COMMIT_AUTHOR: "Travis CI"
+  - COMMIT_AUTHOR="Travis CI"
-  - PUSH_REPO: "git@github.com:ethereum/browser-solidity.git"
+  - PUSH_REPO="git@github.com:ethereum/browser-solidity.git"
-  - FILES_TO_PACKAGE: "assets background.js build icon.png index.html manifest.json worker.js"
+  - FILES_TO_PACKAGE="assets background.js build icon.png index.html manifest.json worker.js"