Formatting for Table of Contents and Technical Edits

Using bullets appropriately with tabs, I'm able to properly nest the headings and various subheadings appropriately in the table of contents, which makes the table of contents more usable and useful.

I also removed the listing in the table of contents for "Tin Can API" as it was the _only_ definition specifically called out in the table of contents and it had no actual section or subsection identifier.

I've also made an edit to the language of Section 2.2.2, as was suggested by Heather Walls, ADL Technical Editor, and Section 2.3, as was identified for edits in the 18 April technical review by ADL.