This commit adds a -base64 option to the consul kv put command, which
base 64 decodeds the data prior to writing it. This can be used in
conjunction with `consul kv get -base64 key`.
I was reviewing some docs and found a few issues.
1. Fixed some spelling mistakes.
2. Re-formatted some paragraphs.
3. Changed some potentially loaded language.
4. Fixed some grammar issues.
5. Tried to consistently use syntax-highlighting.
6. Fixed post-period spacing.
7. Fixed some formatting issues and inconsistency.
8. All "notes" are either proper notes or re-written.
