node v0.10.x support

[springmeyer]

Need to move wscript/waf => gyp.

When this is done should also port to tilelive-s3 blend ported code: mapbox/tilelive-s3#6

[springmeyer]

starting work on this. After initial port and running tests against node v0.10.8 I'm seeing:

 quantization
    ◦ should quantize to 128 colors: Assertion failed: (!uv__io_active(&stream->io_watcher, UV__POLLOUT) || !ngx_queue_empty(&stream->write_completed_queue) || !ngx_queue_empty(&stream->write_queue) || stream->shutdown_req != NULL || stream->connect_req != NULL), function uv_read_stop, file ../deps/uv/src/unix/stream.c, line 1319.
~````

[springmeyer]

Looks like the above assert is due to a bug in node that will be fixed in v0.10.9: joyent/libuv@b38c9c1 | nodejs/node-v0.x-archive#5542

[springmeyer]

not working yet even in node v0.10.9. Downgrading to v0.10.7 works around the problem.

[springmeyer]

going to close this, and track at #34. Basically things are working nicely with node v0.10.7 on ubuntu and OS X. Just needs a bit more testing before merging and tagging a new release.