Rename the binary to `regenerator`

This is more consistent with the name of the project and avoids ambiguity
with the Regenerate package on npm (http://mths.be/regenerate).
Use `regenerator` instead of `regenerate` consistently
Add reference to ECMAScript wiki with generators information.
Use a relative link for tests reference
Adding a few missing semi-colons
Updated tests script for Node v0.11.7
Merge pull request #29 from mathiasbynens/master

Use `regenerator` instead of `regenerate` more consistently
Merge pull request #23 from bartekn/master

Error information before running tests on Node 0.11.7
Link to draft specification as per @benjamn's suggestion
Bump NPM version to 0.2.0 in preparation for publishing.

The minor version bump is mostly due to #29, which renamed
`bin/regenerate` to `bin/regenerator`.

Also, since we have test coverage as far back as Node.js v0.6, I updated
the "engines" property in `package.json` to reflect that.
Merge pull request #32 from AnSavvides/master

README improvements and cleanup
Make sure the binary works even if it’s not installed globally
Merge branch 'use-local-module' of github.com:mathiasbynens/regenerator into use-local-module

* 'use-local-module' of github.com:mathiasbynens/regenerator:
  Make sure the binary works even if it’s not installed globally