Typo issues with -01

[gmandyam]

They can be addressed in a -02 version.

Sec. 3: Change ""It also mentions several claims defined by CWT and JWT are particularly important for EAT." to 'that are particularly important'

Sec. 3: Correct "* All claims are optional * No claims are mandatory *." Redundant.

Sec. 3.11: "Typically, one will be the device-wide EAT that is low to medium security and another from a Secure Element or similar that is high security.” Consider changing "Typically" to "For example".

Sec. 3.11: "The contents of the "eat" claim must be a fully signed, ...". "eat" claim should be "nested_eat" claim.

[laurencelundblade]

I fixed the last two and pushed to GitHub.

I like the first two the way they are.

[laurencelundblade]

Update: fixe the first one now that I see the missing "that".

Have created a separate issue for claim optionality: #23