Add example data for generalized cell table (#11)

- Add example cell data inputs (bb28424336fad03b6402a018108ae6946daf0b9a)
- Remove extraneous columns from generalized_cell_table (04a8022c950951058b9dfd93f3ac112d98bd5cf2)
- Remove Unnamed: columns from generalized cell input (c179dd1d40b5b0d710e96ffde4fe2b33945ce1b7)
- Remove cell_size from the dataset (43041013a7ae4abf64c7b8b6c6a8bc798f3c7318)

data/segmentation/cell_table.zip

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:b4be2617f5ac13fc27a70ee949578d985fa03721df1f508d697a0d9404ff8c18
-size 14370520
+oid sha256:5652338332b1a9c660a13a0162129558ba519d8202b660c965bb39416c6b6f3a
+size 16077054