Use node 0.10.0

This lets us drop the dependency on the BufferedStream package in
favor of node's new auto-buffering streams.

Also, added mach.Content to represent the content of an HTTP
request/response.
Style tweaks
Add hello world prototype
Content simply passes through Readables
Add large file spec
Moved some code out of Request into the spec helper
Add newline
Remove Content
Pass maxContentLength option to parseContent
Small optimizations
Style tweak
Fix variable name
Remove array response support
Remove file buffering code
Add helper for getting spec files
Support returning Buffers from apps
Add mach.gzip spec
Version 0.2.0
Consistency
Make sure lastResponse is null