added 4b numbers to spec.json
fixed floor 4b

breaks whole floors that aren't split yet - resized all floors to the
size of the half floors
split floors, deleted unsplit floor imgs
Merge branch 'four-b-numbers' into split-floors

Need to merge four-b-numbers so that split-floors can be tested
Added empty floors
Sharpened 049-02a.png
Changed default floor to load to 4b
Merge pull request #8 from RITHonorsTechCommittee/split-floors

1. Split floors into a-side/b-side.
2. Incorporated floor coordinates for 4b
3. created dummy 2a,2b,3a,3b,and 5b entries in `spec.json`