Add Travis and test coverage

Notes:
- npm run test also runs the memory tests, which might be flaky on
  some systems.
- npm run test-coverage only runs the unit tests (it can't run the
  memory test anyway because the memory tests create a Node child
  process, and istanbul cannot cover that).

.travis.yml

@@ -0,0 +1,8 @@
+language: node_js
+node_js:
+  - node
+  - 0.10
+script:
+  - npm run lint
+  - npm run test
+  - npm run test-coverage && cat coverage/lcov.info | ./node_modules/.bin/coveralls && rm -rf coverage

README.md

@@ -1,3 +1,6 @@
+[![Build Status](https://travis-ci.org/Rob--W/cors-anywhere.svg?branch=master)](https://travis-ci.org/Rob--W/cors-anywhere)
+[![Coverage Status](https://coveralls.io/repos/github/Rob--W/cors-anywhere/badge.svg?branch=master)](https://coveralls.io/github/Rob--W/cors-anywhere?branch=master)
+
 **CORS Anywhere** is a NodeJS proxy which adds CORS headers to the proxied request.
 
 The url to proxy is literally taken from the path, validated and proxied. The protocol

package.json

@@ -26,14 +26,17 @@
     "requires-port": "1.0.0"
   },
   "devDependencies": {
+    "coveralls": "^2.11.6",
     "eslint": "^2.2.0",
+    "istanbul": "^0.4.2",
     "mocha": "~2.2.4",
     "nock": "~1.9.0",
     "supertest": "~0.15.0"
   },
   "scripts": {
     "lint": "eslint .",
-    "test": "./node_modules/.bin/mocha ./test/test*.js --reporter spec"
+    "test": "mocha ./test/test*.js --reporter spec",
+    "test-coverage": "istanbul cover ./node_modules/.bin/_mocha -- test/test.js --reporter spec"
   },
   "engines": {
     "node": ">=0.6.6",