Some cleanup of files and todos

We should be using UnsafeCell, but we can't until there is some movement
on using static with internal mutability (we should technically be using
static mut, as static should be in the rodata section).

Also dropped the stats collection in favour of parsing the Travis logs.
Merge pull request #122 from bharrisau/cleanup1

Some cleanup of files and todos

Reviewed-by: farcaller