attempting to fix link to valid options properties

Current link for 'valid properties are available here' goes to url:

https://github.com/nodejitsu/node-http-proxy/blob/caronte/tree/master/lib/http-proxy.js#L26-L39

The url works fine if 'tree/master/' is removed, so this is trying to remove that part of the relative path.

The same removal of 'tree/master/' is being made for the 'available here' link that is preceded by "When a request is proxied it follows two different pipelines" since it suffers the same issue.
Merge pull request #502 from jamesmanning/patch-1

attempting to fix links to 2 source locations in README.md
[tests] the options got a problem and this test probe that timeout is not being set
[fix] fixed options and server reference to can access them from passes functions
[fix] fixed passes functions, now 'this' can be used and options are stored on 'this.options'
[tests] fix test to use the new way to pass options
Revert "[tests] fix test to use the new way to pass options"

This reverts commit 52ecd52ee5aa78603e44ba8d5ff9187410351622.
Revert "[fix] fixed options and server reference to can access them from passes functions"

This reverts commit 90fb01d38ac5af7ef395547b24e985b6f63b4abc.
Revert "[fix] fixed passes functions, now 'this' can be used and options are stored on 'this.options'"

This reverts commit 9b3e1eb247df29d18ea299ff4ebb2f10eeb71269.
[fix] minor typo
Fixed issue where error callback would not invoke, including new test cases. Added req/res values to error events.

Conflicts:
	lib/http-proxy/passes/web-incoming.js
[tests] move contributions of @mmoulton to correct place
[fix] use the correct arguments order
[tests] this file is not necessary anymore
[fix] fix the correct order of arguments in ws-incoming passes
[tests] tests fixed
[tests] now each test use a different port to avoid some slow opening and closing ports
[tests] this test is already in web-incoming tests
[examples] update the error-handling example using the new error handle way
[feature] add buffer support