Add simple benchmarks for promises
Updated Promise perf tests to work in CI
Merge pull request #6 from derek/promise-bench

Updated Promise perf tests to work in CI
Delete old benchmarks
Updated path to Benchmark.js for app, base, event-custom, node, tabview, and transition.  Also, updated async execution and logging of results to match the latest API.
Merge branch 'promise-bench' of github.com:juandopazo/yui3 into juandopazo-promise-bench