Xspf-fixup

* [Adds make report in markdown](https://github.com/jbokser/xspf_fixup/commit/abdac1da80326cf9598029c64ea6a2f02e3e503f)
* [Adds `to_xspf` tool](https://github.com/jbokser/xspf_fixup/commit/ba6ef0866e2dea2dda6dbe0157bb5be9475d9f7c)

* [New and better CLI](https://github.com/jbokser/xspf_fixup/commit/7e8485e88083eaef6d506a0e1fd2f51df62cedda)
* [A better `prettify()`](https://github.com/jbokser/xspf_fixup/commit/10f9ee098d0f42c93d290531707b4ba876462cfe)

* Adds missing dependencies
* Fix output file (problems with `.prettify()`)

First release