gitignore - bin/civicrm-upgrade-test is a symlink created on each installation
civi-download-tools - Ensure that tar, gzip, and bzip2 are available
composer.json - Update civicrm-upgrade-test

New version calls bzip2/gzip directly (instead of using bzcat/gzcat)
and includes more sample databases.
Merge pull request #46 from totten/master-misc

civicrm-upgrade-test - Misc fixes