Revert "Revert "Significantly simplify the bootstrap codebase, move prose configuration into _prose.yml""

This reverts commit b0eb4c0e05180dd06bcd137992947adc4cd04705.
Revert "Revert "Simpler README for now. Closes #5""

This reverts commit 55e7170d0774adfa04f50ba3a5d3e62a925d0823.
Revert "Simpler README for now. Closes #5"

This reverts commit f712d17b6173cb2151326aff7e7da0d47811711e.
Revert "Significantly simplify the bootstrap codebase, move prose configuration into _prose.yml"

This reverts commit 6d3191c08566a0eab5791be27896b6ec42c3f2cb.
Revert "Poole -> Prose"

This reverts commit 43dda1abf1b733bf94e2f32091909d1aab3d8e03.