Add CircleCI to ensure npm support on unix machines

Add missing babel-jest for CircleCI (not sure why it's ok for travis/yarn)

README.md

@@ -1,6 +1,7 @@
 # [![Phenomic](https://rawgit.com/MoOx/phenomic/master/logo/phenomic.svg)](https://phenomic.io)
 
-[![Unix Build status](https://img.shields.io/travis/MoOx/phenomic/master.svg?branch=master&label=unix%20build)](https://travis-ci.org/MoOx/phenomic)
+[![Unix/Yarn Build status](https://img.shields.io/travis/MoOx/phenomic/master.svg?label=unix%2Fyarn%20build)](https://travis-ci.org/MoOx/phenomic)
+[![Unix/npm Build status](https://img.shields.io/circleci/project/github/MoOx/phenomic/master.svg?label=unix%2Fnpm%20build)](https://circleci.com/gh/MoOx/phenomic)
 [![Windows Build status](https://img.shields.io/appveyor/ci/MoOx/phenomic/master.svg?label=window%20build)](https://ci.appveyor.com/project/MoOx/phenomic/branch/master)
 [![Code Coverage](https://img.shields.io/coveralls/MoOx/phenomic/master.svg)](https://coveralls.io/github/MoOx/phenomic)
 [![Version](https://img.shields.io/npm/v/phenomic.svg)](https://github.com/MoOx/phenomic/blob/master/CHANGELOG.md)

circle.yml

@@ -0,0 +1,18 @@
+machine:
+  node:
+    version: 6
+
+dependencies:
+  override:
+    - npm prune
+    - npm install
+
+  cache_directories:
+    - node_modules
+    - docs/node_modules
+    - themes/phenomic-theme-base/node_modules
+    - test-setup/node_modules
+
+test:
+  override:
+    - npm test && npm run docs-webpack-2-test && npm run docs-webpack-2-reset

package.json

@@ -88,6 +88,7 @@
     "babel-cli": "^6.14.0",
     "babel-core": "^6.14.0",
     "babel-eslint": "^7.0.0",
+    "babel-jest": "^17.0.0",
     "babel-plugin-flow-react-proptypes": "^0.10.1",
     "babel-plugin-istanbul": "^2.0.0",
     "babel-preset-latest": "^6.14.0",