Tooling update (#184)

* Use a common Makefile/build process

* Use ESLint with the pa11y lint config

test/.eslintrc.js

@@ -0,0 +1,15 @@
+'use strict';
+
+// Clone the main config
+var config = module.exports = JSON.parse(JSON.stringify(require('../.eslintrc')));
+
+// We use `this` all over the integration tests
+config.rules['no-invalid-this'] = 'off';
+
+// Because of our use of `this`, arrow functions
+// aren't really gonna work in the integration tests
+config.rules['prefer-arrow-callback'] = 'off';
+
+// Disable max line length/statements
+config.rules['max-len'] = 'off';
+config.rules['max-statements'] = 'off';