replace uuid4 with 24bit auto-increment base64
add length/sum stat
Merge pull request #15 from buhman/auto-increment

replace uuid4 with 24bit auto-increment base64
Merge pull request #16 from buhman/shorter-urls

/p/ is bloat; use / instead
Merge pull request #17 from buhman/more-stats

add length/sum stat
added pygments highlighting