Replace buster dependency with formatio
Up version
Don't include setImmediate in list of methods to reset unless proven available
Ignore failed attempts at restoring globals
Group tests to avoid double setup
Fix to make Weinre play nice

Manually applied https://github.com/fiznool/Sinon.JS/commit/e50ec57cba1f9e89c081ed146e34ae39349b95a2
Quick "fix": put unstable tests in separate files
Mirror custom Date properties when faking time
Replace buster-format with formatio in node

This is a follow up of commit 12421240 which missed a buter-format
reference.
Quick "fix": disable unstable tests in node

Add a command line argument to reenable. This is a "Quick Fix" based on
commit 6d4de31 which did the same thing but for browser tests only.
Merge pull request #388 from sukima/feature/fix-broken-test-package

Fix failing tests on Travis-CI