Add failing tests for `SystemCommand`
enable Leopard / Snow Leopard compatible versions
snow leopard compatible cleanmymac.rb

enable "classic" version
Snow Leopard compatible sourcetree.rb
In `SystemCommand`, fix `success?` and `exit_status`

When invoking a `SystemCommand` with `:must_succeed => false`, the `SystemCommand::Result` class would mistake a `Process.Status` object for a `Fixnum`.

This commit fixes this by instantiating `Result` with the actual status code as a number.
Merge pull request #7895 from claui/fix-system-command-exit-status

In `SystemCommand`, fix `success?` and `exit_status`
Add reason for skipping syntax tests

This might help debug issues like the failing Travis build in PR #7895.
added license to sync
Add Yate.app v3.2
Add MP3Gain Express v1.2
Merge pull request #7901 from vitorgalvao/fix-7899

Fix 7899
cookie.rb now uses :latest
macx-youtube-downloader.rb now uses :latest
Merge pull request #7900 from claui/syntax-test-add-hint

In syntax tests, amend `skip` directives to carry the reason for skipping
enable latest ``legacy`` version, Snow Leopard compatible

Closes #7868.
Merge pull request #7902 from vitorgalvao/fix-7868

enable latest ``legacy`` version, Snow Leopard compatible
enable Snow Leopard compatible version

Closes #7867.
Snow Leopard compatible poedit.rb
Merge pull request #7903 from vitorgalvao/fix-7867

enable Snow Leopard compatible version
enable latest ``legacy`` version, Snow Leopard compatible

Closes #7866.