Architecture Page: Improve Clarity

Intergrate feedback from @tacurran with previous revisions to architecture page, improving clarity, correcting typos, adding links, and improving formatting.

Signed-off-by: Dominic Serio <dominic@flynn.io>
Architecture Page: Improve Clarity

Signed-off-by: Dominic Serio <dominic@flynn.io>
Merge branch 'website-docs' of https://github.com/flynn/flynn
Website: Tweak Development Page

Basic edits to Development page, for review by @danielsiders and/or @titanous.

@lmars, I modified the whitespace of log outputs for readibility (remove a ton of whitespace after process, add whitespace around some columns) can you adjust flynn-host to match whatever we post as the final page?

Signed-off-by: Dominic Serio <dominic@flynn.io>