dtrace: fix style in ustack helper
dtrace: x64 ustack helper
dtrace: Make D style more D-ish
dtrace: More style

Continuation lines should be indented with 4 spaces, not a tab.
build: fail w/err msg when missing binutils

Building --with-dtrace requires objdump from GNU binutils.
This change inserts a helpful error message if there is a
problem executing objdump.
net: fix bufferSize include writableStream length

socket.bufferSize missed to include the length of internal buffers in
writableStream.
typed arrays: replace switch with templates

Convert TypedArray's TypeName implementation to template specialization
instead of a switch() statement.
typed arrays: don't declare as module

TypedArrays is not a module, it is attached to the global object.
Don't register it with Node's module system.
doc: os.cpus() returns times in milliseconds
buffer: floating point read/write improvements

Improvements:
* floating point operations are approx 3x's faster
* Now write quiet NaN's
* all read/write on floating point now done in C, so no more need for
  lib/buffer_ieee754.js
* float values have more accurate min/max value checks