Pre-release #2 of Sinon 2

• CJSify remaining tests
• Expose sinon.assert on sandbox instances. (#1076)
• Add resetBehavior and resetHistory to sandbox API (#1072)
• Add sandbox.reset() docs
• Allow xhr.respond(0) to simulate a network failure and call onerror
• Use event loaded instead of error event for code like 403, 500, etc.
• Fix invalid markdown in fake-timers.ms (#1054)
• Do not invoke getters in walk (#1059)
• ReactNative compatibility. Allow sinon fakeServer to run in React Native (#1052)
• Fix onerror event triggering for fake xhr requests (#1041)
• Allow sinon.calledInOrder to be called either with an array of spies or multiple spies as parameters. Add explicit test cases for sinon.calledInOrder
• Document faking of setImmediate and clearImmediate
• Add support for es6 Symbol to wrapMethod, match.same, yieldTo, match methods.
• Transition to Mocha and ESLint for tests
• Feature detect proto to exclude a timer test in IE 10
• Migrate Packaged Tests to use a Browserified Build.
• Improve Blob support detection logics
• Remove sinon.test() and sinon.testCase (now in sinon-test module.)
• Remove sinon.log and sinon.logError
• Fix 648: test for this.proxy before trying toString on it
• use the correct sinon.deepEqual to test sinon matcher
• Get rid of eval in sinon spy