Implemented tips

Ensured that a URL, code fragment, and bolded text were inside tips.

Resolves #8
Merge pull request #14 from gregturn/tips

Implemented tips
Added table support.

Resolves #9
Figured out how to properly format quotes, attribution, and even throw in citation source

Works like a champ, and I have updated the README.adoc to show samples

Resolves #4
Render images
Merge pull request #10 from gregturn/image

Partial solution for image
Added support for single-backquoted text (code-in-text)

Tried to plugin for the other types, like strong, and hit similar issue spotted in #12.

Resolves #13.
Update keyword styling