Various dev bundle upgrades

* http-proxy: 1.0.1 (from a pre-release fork of 1.0)
* Node: 0.10.24 (from 0.10.22)
* semver: 2.2.1 (from 2.1.0)
* request: 2.33.0 (from 2.27.0)
* fstream: 0.1.25 (from 0.1.24)
* tar: 0.1.19 (from 0.1.18)
* eachline: 2.4.0 (from 2.3.3)
* source-map: 0.1.31 (from 0.1.30)
* source-map-support: 0.2.5 (from 0.2.3)
* mongo: 2.4.9 (from 2.4.8)
* openssl in mongo: 1.0.1f (from 1.0.1e)

Have not yet updated the various minimum Node version requirements.
Bump dev bundle version.
Update Node to 0.10.25. Remove bug workaround.
Use a fork of http-proxy with two PRs
Add $USE_TEST_DEV_BUNDLE_SERVER
Update to newer http-proxy API

Take out workaround that's been incorporated into the branch we're using
Merge branch 'dev-bundle-http-proxy-1' into devel