* Tempfile and temp directory cleanups
Add comments about mktemp on different platforms
Be more careful about tempfile cleanups
Don't use find to locate files to cleanup
Use shorter SECRETS_EXTENSION and SECRETS_DIR env settings in tests
Set TMPDIR in tests again
Show DESTDIR used when testing git-secret install
Change filename passed to mktemp -t in tests
* Only show 'cleaning up temp file' messages if one
of SECRETS_VERBOSE or SECRETS_TEST_VERBOSE is set.
* Adjust tests to reflect the change.
* Add note about suppressing 'cleaning up' msgs to CHANGELOG.md and reorder entries
* add comments showing examples of tmpfiles returned
* add a travis target using SECRETS_TEST_VERBOSE=1
* Document SECRETS_TEST_VERBOSE as experimental
* note experimental feature may change or be removed
* improve how we check for ignored files using 'git check-ignore'
* mention use of git check-ignore in changelog
* don't mkdir/rmdir when testing for ignored files
* Change 'add' to add to .gitignore by default.
Also add _message() function and improve output from 'git-secret-add',
alter tests for new code behavior, and update docs.
* change tests since 'add' always adds to .gitignore
* improve output: prepend more message with 'git-secret:'.
* update man page for git-secret-add
* perform lint/shellcheck tests on travis mac builds
* move osx builds first in travis
* install shellcheck on macos
* show if the lint test passed or failed
* don't have travis install ruby 2.6 on osx for now
* add test for travis-ci windows support
* Make 'ps' command options platform specific *nix/windows
* Add _clean_path for windows, apply to all homedir input arguments
* export GITSECRET_DIST="windows" in git hook if running windows
* Bash lint fixes
* use pgrep & kill, not ps+gawk+regex+system+kill
* install shellcheck and enable lint on macos/brew.
* add shellcheck fixes and exception
* reorder CHANGELOG entries
* Support SECRETS_VERBOSE env var in addition to -v
* don't use --quiet when decrypting in verbose mode
* show output of gpg encryption in verbose mode
* add tests for SECRETS_VERBOSE env var set to 0 and 1
* update changelog, reorder entries.
* add tests for 'cat' and 'hide' with SECRETS_VERBOSE=1
