V2 Proofreading

[jonnew]

A final proofread is required with a focus on the following issues:

• Lax specification of register values' effects #33
• Conform to RFC2119 specification word definitions in the the hardware spec #38
• Check all external links #75
• Misuse of Host, Controller, and Slot terms in Hardware spec #44

A proofreading PR should address this issue and close all the above issues.