Handle potential exec errors
Fix broken link
Fix install target
Use install(1), not cp(1)
Remove config.mk

This simplifies the build process.
Update README.md
Update README.md
Add -C screen clear option
Expand !loop branch syntax
Don't use defer in cleanup()

Unnecessary at this scale
Reword abort message
Reword comment to use proper tense
Remove unnecessary import
Remove needless line break
Use newly merged tty::noncanonical
Install by default to /usr/local

As should packages installed globally, not by a package manager.
Accept Enter key as well