Improve error handling
INSTALLING: Add missing cargo-deb requirement
Tweak the manpage
Add a TODO about buffering
Uppercase the manpage title
List some desirable features
Add some installation instructions
Use "cargo run" to build the docs

This sidesteps the bootstrapping issue.
Remove debugging traces
Stub out the docs if flin isn't installed
Dogfood the docs
Rename again
Link to bugtracker
Change name; add README
Initial commit