fall back to doctesting all files if new files cannot be identified
Merging latest dev scripts to avoid conflict in sage-dev
Relax the cmdline test of "sage -dev", it may be disabled
Trac #15465: Allow using Sage without git repository

For binary builds and perhaps tarballs we should not require the git
repository. This ticket fixes two doctests for that use case.

URL: http://trac.sagemath.org/15465
Reported by: vbraun
Ticket author(s): Volker Braun
Reviewer(s):