Simple optimization to the framing code to remove an additional math
operation
Added a new send overload in the websocket that lets the use send an
offset and length argument as well, this prevents the user from having
to potentially create an intermediate copy of the buffer, if the entire
buffer is not being used.
Rearranged method signatures to avoid overloaded name collisions.
Simplified the framing code down to division by a single constant,
rather than repeatedly calling the Math.pow method.
Merge pull request #126 from paulpdaniels/optimize-framing

Optimize framing