Fix for minimal set of system-installed libraries

Mark actually required libraries as required, move extlib call to before LJ/Directory.pm
otherwise we cannot find List::MoreUtils
Set lastaccess to initial create time, to avoid confusion.

Fixes 920, which was entirely me being silly -- but I think this is better behaviour.
Merge pull request #922 from anall/feature/issue920

Set lastaccess to initial create time, to avoid confusion.
Merge pull request #921 from anall/feature/UsingCpanm

Fix for minimal set of system-installed libraries