Create Map Data Structure

[kOchirasu]

Create a map data structure, which can be serializable, so it can be saved to file. Also create a map editor so that maps can be easily edited. Finally, refactor code base to implement map data instead of reading from hard-coded arrays. Map data could also include spawn point of pacman and ghost data.

~200 points

[mliou]

Approved.

[ryantse]

Completed serializable level data. Per commit f6f8ee1ac8a8e2b16022a5f02731fdf43d879ae2.

[ryantse]

@hannavigil

[hannavigil]

See #42