Mention Harmon used for response modifications in the readme

[No9]

As requested by @indexzero #382
Not sure exactly where I should put the text but middleware seemed to be the best section to me.

[gurjeet]

@indexzero @No9 This merge/code has been lost to later merges. This is a very useful information, and should be in the README!

Please re-pull this.

[jcrugzz]

@gurjeet while this is an awesome plugin it is no longer compatible with the newest implementation as node-http-proxy has been simplified.

[gurjeet]

@jcrugzz Thanks for letting me know! I was planning on using it, but you saved me some head-banging :)

Are there any alternatives packages available?

[No9]

@gurjeet harmon is OPEN open source.
If you make an accepted pull request to upgrade to 1.0.0 http-proxy I will add you as an administrator

[No9]

@jcrugzz Thanks for your kind words!

So i have updated the harmon docs and tests to reflect the 1.x release version of http-proxy and we have upgraded trumpet. Can you let me know if you would accept a pull request on the README again or are you putting it somewhere else now?
cc @gurjeet @indexzero

[jcrugzz]

@No9 I would totally accept a PR to put that in the docs :).