This is not the supposed end of these changes, but a first change that
should make future changes easier to reason about.

Currently the module tests don't cover the cases for when a user
requires a file with a request that includes the extension, and for a
request to a file with no extensions.

ex.

require("./a.js") // not tested
require("./foo") // (not tested with trying to load a file named ./foo)

   + Utf8Length is really slow but has the same semantics in this case

You may need to reconfigure after this commit due to the new library.

make cpplint
make jslint
make lint

Run with 'make lint'