Fix Can't call method "Capture::Tiny::capture" when install with --sitecustomize option
Merge pull request #316 from hirose31/fix/call-capture-tiny-capture

Fix Can't call method "Capture::Tiny::capture" when install with --sitecustomize option
avoid undef value warnings.
Tests for the "files-are-the-same" sub.
re-arrange the code to put sub/methods together with each others.
minor typo fix
missed File::Spec there.
Add a subroutine to pull out config_arg* from %Config hash.
remove documentation for the deprecated 'install-ack' command
Merge pull request #318 from elindsey/develop

remove documentation for the deprecated 'install-ack' command
rebuild
version bump
Merge branch 'release/0.63' into develop
Spelling corrections
Merge pull request #319 from dsteinbrunner/develop

Spelling corrections
dependency version bumps.
Avoid showing warnings when directly switching between different perl/libs combination.
rebuild
Ensure a clean build environment

We want to begin each new build in a frech directory, so
remove it prior to extracting the tarball. GNU tar's
--recursive-unlink option will "empty hierarchies prior
to extracting directory".

Fixes gh-295.
Fix spurious test failures