Travis fixes(#127)

* Push to npm only on tags
* Make docker build on tag or branch commits and tag the images appropriately

.travis.yml

@@ -6,15 +6,15 @@ node_js:
 - '0.10'
 before_install:
 - npm install -g npm@'>=2.13.5'
-after_success:
-- if [[ $TRAVIS_TAG ]]; then CURL_DATA='{"source_type":"Tag","source_name":"'"$TRAVIS_TAG"'"}'; else CURL_DATA='{"source_type":"Branch","source_name":"develop"}'; fi
-- "curl -H \"Content-Type: application/json\" --data \"$CURL_DATA\" -X POST https://registry.hub.docker.com/u/rocketchat/hubot-rocketchat/trigger/$PUSHTOKEN/" 
 deploy:
   provider: npm
   email: [email protected]
   on:
     tags: true
-    all_branches: true
+    all_branches: false
   skip_cleanup: true
   api_key:
     secure: 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
+after_script:
+- if [[ $TRAVIS_TAG ]]; then CURL_DATA='{"source_type":"Tag","source_name":"'"$TRAVIS_TAG"'"}'; else CURL_DATA='{"source_type":"Branch","source_name":"'"$TRAVIS_BRANCH"'"}'; fi
+- "curl -H \"Content-Type: application/json\" --data \"$CURL_DATA\" -X POST https://registry.hub.docker.com/u/rocketchat/hubot-rocketchat/trigger/$PUSHTOKEN/"