Don't use object identity check

- just make sure it has the same content
Refactor file path to nyan cat mp3
Downcase the platform when checking just to be safe
Add linux support via mpg321

- also refactor killing the music
Update REAME to indicate linux support
Merge pull request #28 from unimatrixZxero/show-some-mpg321-love

Show some linux a.ka. mpg321 love
Nyan cat dies if specs finished and their are failed or pending specs. :-(
Version bump.
Added the functions to reproduce with mpg123
Fixing problem with execution of command type
Added the test and the entry on the README file
[#32] Fix for error when running non-music formatter.
Merge pull request #31 from hermes-logicalbricks/master

Now work in Linux with mpg123 too
Merge pull request #33 from firefly21/master

Fix for Issue #32
Version bump
First version of width formatter
Huge and simple performance optimization
Improve tests for both original and wide nyancatformatters
Standarize some naming
Add info to README