Rename test files to remove initial nums.
Clean up first test file.
Further test cleanup.
Finish test file cleanup.
Modified length to be exclusive.

The code was displaying the graphs without the lower most value.
The length calculation was assuming that the lower most value was
displayed. It appeared to be easier to make the code work by changing
the second, rather than the first.
Fix tests to match new algo.
Update MANIFEST
Clean up for release.