Replace mime library.

[eiriksm]

Hello. This is the same PR as in #87 with 2 differences:

• Only replace the mime library (not upgrading dependencies)
• Use "node 0.8-friendly" dependency declarations (as requested in that PR).

So, more or less the same PR, but since there was no activity there, I rather just took the matter into my own hands. Also because this currently breaks browserify support for request (see request/request#455)

[nylen]

A big 👍 from me and the rest of us at request, we'd really like to get this merged and get a new version of form-data that works with browserify.

[alexindigo]

Thank you for the simple PR. Going to push new version.

[alexindigo]

Published 0.2.0 https://www.npmjs.org/package/form-data

[nylen]

Thanks @alexindigo!