implement stream readable for ServerRequest

no-ops all the way down
Merge #401 r=@jiahuang: implement `._read` for ServerRequest

fixes this https://forums.tessel.io/t/why-does-a-call-to-on-data-throw-an-error-not-implemented/710/4
Fixes bug where callback would be assigned as backlog which threw off eventemitter
Adds callback check to crypto
Added test for crypto change
Fixes default backlog implementation
Merge #408 r=@johnnyman727: Jon socket fixes

Minor changes that enable [`node-websocket`](https://github.com/sitegui/nodejs-websocket) to run on Tessel.
Supports ENABLE_NET build flag.
Corrects tm_fs_write to return 0 on success.
Merge #412 r=@kevinmehall: Corrects tm_fs_write to return 0 on success.
Merge #410 r=@kevinmehall: Supports ENABLE_NET build flag.
Supports js_pairs on function objects. See #337
Adds test for #337.
Requires colony-compiler >0.6.18.
Merge #413 r=@kevinmehall: Supports js_pairs on function objects. See #337
Throw on non-function listener
Fix for #223
Test added
Adds _global object to global alias.
Using top level tap module for tests
Comment removed
Adds support for hasOwnProperty for numbers