Added tests for https and setting Certificate Authority;
Added functionality to set request Certificate Authority;
Avoid undefined values on query parameters.

From an object like:
```js
var params = {
  hello: 'world',
  bye: undefined
```

the result should only be `hello=world&bye=undefined` if `bye: 'undefined'`
add test and update build
Issue #214: fix issue with redirects and Node 0.10. Responses must be consumed even in the case of redirects otherwise the http connection pool will eventually hang connections. Tested with node 0.8.23 as well.
#214: fix response-readable-stream.js test for Node 0.10 that expects the close event to be fired. Tested with node 0.8.23 as well.
Merge pull request #233 from lbrucher/master

Fixes for #214 (issues with Node 0.10)
Emit 'end' when piping.
Ignore temp file created by test.
Merge pull request #239 from timoxley/bug/pipe-end-event

Emit 'end' when piping.
Release 0.15.2
update formidable
ocd
ocd
add more debugs
add more debugs
fix formidable error handling
update express dev dep
debug
fix passing of errors