Added a simple test to make sure streaming "works"
Added some more detailed stream tests for testing LJM buffering and
performed some preliminary speed result testing
Moved some code around so that the node 0.11.x process can load a version
of the json constants file w/o loading ref and ffi which cause issues
Version 0.0.17: library now supports streaming! Unit tests performed in
device_test.js as well as some integration tests.  Also switched to using
"npm test" and "npm run xxx" for running the nodeunit tests.  The library
can also be incrementally loaded so that programs running newer versions
of node that aren't supported by ref and ffi can still use the
json_parser (which should really be split into its own module).