move the version requirement to the place it is needed
also scan executable files for runtime prereqs
rename the finder arguments to indicate what they represent, not their (current) default values
document the file finder options, their current defaults, and how to change them
again remove the .t, .pm, .pl exclusion - many perl executables do not have a suffix
Merge pull request #5 from karenetheridge/topic/fix_finders

Fix use of file finders