make tests run faster / organize test dirs

[Dan MacNeil]

Right now tests take more than two minutes to run, this is too long

TAP::Harness allows tests to be run in parallel maybe works also with:

    Test::Aggregator which allows tests to run in the style of fast_cgi to load stuff once.

test directories will have to be moved around

It would also be nice to have a "run all" command that shows only summary output

It might make sense to create an

xt/ directory for "extra tests" , take a long time
at/ directory for "author tests" ,
   stuff that is of interest only to authors, we wouldn't require test dependencies
  for when installing

a branch for this bug could probably be merged several times

[Dan MacNeil (omacneil)]

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[Dan MacNeil (omacneil)]

TAP::Harness allows tests to be run in parallel probably works w/ Test::Aggregator

http://search.cpan.org/~andya/Test-Harness-3.17/lib/TAP/Harness.pm

[Lee Goodrich (leegoodrich)]

From refactor.txt: Separating the development tests.

move test files that require relatively exotic modules
and are more useful for development than build/install
to dir like:

 app-mvhub/t/dev/

setup BEGIN {} guards to run only if module is installed

put modules in BUILD.PL 'recommends'

 like perltidy.t

---so installation on non development systems is easier