Initial commit for CtCI 4.2
Merge branch 'master' of github.com:JESii/CtCI-with-Ruby-TDD

git pull update from work done on EDP15
Adding convenience methods...

move(from,to) to make a specific move.
bounce_{left/right} to move the 1 two hops left or right (the basic move).
move_next() to make next possible move after a bounce, ignoring the 1.
In process...

TODO: resolve indexing issues.