Fix installation bug when using require install and clean up sloppy log
Simplify error reporting - closes #11
rename meta-utils to introspect
If idents are customized using install function then reflect idents in error messages too
Revise the purry_incomplete_holes error with purry_trailing_holes which is more complete; several ocd changes too
Do not create a special error case for single hole arguments; if use-cases for single pin arguments arise then reconsider to help new-comers learn the difference