Add few tap reporters

[axross]

I created two TAP reporters. Could you add these to README#pretty reporters?

tap-notify

the Notifier for the TAP. This pass through TAP messages to stdout. You can use as tape *.test.js | tap-notify | tap-some-reporter.

tap-diff

Simple reporter. This shows diffs when assertion failed.

[Raynos]

Can we remove the white space commit ?

The extra projects look great.

[axross]

@Raynos

Thank you so much!
I reverted a commit Remove unneeded whitespaces in README. Could you check it?

[Raynos]

Thanks! :)