index: fix jshint error

Wrap a too long line in a jsdoc comment.
test: increase timeout for browserify
test: add `global.navigator` for browser tests

The debug module uses `navigator.userAgent` to detect whether the
browser support colors in console logs.
test: ensure sandbox dir is present

Fix test/browser.test.js failing on CI due to sandbox dir not present
on the first run.
Merge pull request #36 from strongloop/feature/fix-CI-build

test: fix failures on CI
Update contribution guidelines

Replace commit signing process with https://cla.strongloop.com/
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Update contribution guidelines
  test: ensure sandbox dir is present
  test: add `global.navigator` for browser tests
  test: increase timeout for browserify
  index: fix jshint error

Conflicts:
	index.js