Merge pull request #1338 from PathwayCommons/3.1.0

PC apps version 3.1.0

Author: maxkfranz

.travis.yml

@@ -4,11 +4,3 @@ node_js:
   - "8"
   - "stable"
 script: npm run test:travis
-sudo: required
-before_install:
-  - sudo apt-get -qq update
-  - source /etc/lsb-release && echo "deb http://download.rethinkdb.com/apt $DISTRIB_CODENAME main" | sudo tee /etc/apt/sources.list.d/rethinkdb.list
-  - wget -qO- https://download.rethinkdb.com/apt/pubkey.gpg | sudo apt-key add -
-  - sudo apt-get update
-  - sudo apt-get install rethinkdb
-  - rethinkdb &