dh-17 Longest Collatz sequence

My solution takes 2.30 minutes.  While the C solution takes about 1 second.
I believe the slow down is thanks to all the objects I keep creating/destroying.

I really thought the trianglular nature of my algorithm would help, but it seems to hinder it more than anything
Merge pull request #27 from wh1pch81n/dh-17

dh-17 Longest Collatz sequence