Summary of changes to "The Blob Complex" for version 2
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All changes are relatively minor.

- terminology change: "topological n-cat" --> "disk-like n-cat"
- terminology change: "plain n-cat" --> "ordinary n-cat"
- add two citations (U. Tillman, R. Brown for n-fold categories)
- added that action in last n-category axiom should be compatible with action in first axiom
- added summary of n-cat data and properties
- added mention of (n+1)-cat of sphere modules to the intro
- added discussion of n-cat nomenclature to the intro