Snek segments not properly following head

[SkyeErnst]

When their are more than two snek segments, any segments spawned in never move.

[SkyeErnst]

So it seems like every time a new segment is made after the first segment, the new segment is the one that follows along with the head and the old one stays put. A fix for this would maybe be to make the new segment in the next movement cycle, rather than instantly.

[SkyeErnst]

This may actually be related to issue #36. If the parts of the snek are getting dropped from the list, then that could be the problem.