Item13079: More refactoring of Bootstrap

Clean up the "noload" hack uset by TestBootstrapPlugin

Add a "noLocal" option to readConfig().  This is used during
bootstrap testing so that Spec files can be merged without loading a
LocalSite.cfg file.

Needed: addition of $reporter support instead of returning
strings.
Item13081: Some tools/configure cleanup

Add some documentation,   and avoid undef errors in _prompt
Item13068: New checker for Store Implementatino

Add a new findFileOnTree utility to recursively search the file tree and
report if a file matching a pattern is found.

Implement a pluggable Store Implementation checker, and add a checker
for the PlainFile implementation.  If any rcs ",v" files are found on
the path report a configuration error.