Add `holes`, update `tim`, `etr`, `wsample`

tim:

• Add ohead auto shell overhead subtraction
• Correct bootstrap saturation test & warn not fail
• Add better k controls
• Update docs & update bu/emin library portion as well

hole:

• Add this program. See doc/holes.md

etr:

• Rename "op" -> more scrutable "outp"
• Add maximum ratio exit status protocol for callers
• Add minimum fraction-done estimation for ratio
• Add --kill to outright kill job if --RatMin exceeded
• Update docs a lot

dfr:

• Add screenshots
• Add much to docs

wsample:

• Simplify by removing multiplicity feature
• Emit a binary file to avoid future parsing work

Various other cosmetic (end of line space) &| nimPreviewSlimSystem updating.