Initial gtest import.
Break out radix_sorter for testability.
First test of radix_sorter.
Shift around JS tests to their own directory.
Rework radix_sorter tests.
Rename test.cc -> radix_sorter.cc
Merge branch 'tests'

Conflicts:
	Makefile
gtest -> src/vendor/
Test handling of adjacent empty lines.

And fix the bug.