THRIFT-1957 NodeJS TFramedTransport and TBufferedTransport read bytes as unsigned
Patch: Matthew Imrie

Add method to binary.js to properly read a byte type as
signed Changed transport.js readByte methods in
TFramedBuffer and TBufferedTransport to use binary.js
readByte method Added unit test for binary.js readByte
method to binary.test.js and changed test harness to
nodeunit.