Add --store option to dev/timings.pl

This allows us to store the results of previous runs for comparison
Add --clear option to dev/timings.pl

Using this option clears any existing timing information
Merge 'dev'->kessel (Win32 fix)
Merge branch 'dev' into kessel
Merge branch 'dev' into kessel
Merge branch 'dev' into kessel
Merge branch 'dev' into kessel
cover more cases in find-minimum-dep-version
verb form of setup is set up, same with clean up
ignore garage stuff
explicitly use a required module rather than relying on someone else having loaded it
Fix bug with format creation
Print previous results if available
Move timing logic into its own sub
Allow users to specify with versions of ack to time
Add --perl option to timings

Allows users to specify which perl executable to test with
Detect failure when timing acks
Add TODO for timings.pl
Fix for config-finder.t so cygwin install passes.

This generalizes the set_up_global function to work on anything; this
means that this test passes under both standard Windows (Strawberry)
Perl and cygwin perl.
Spacing fix