Make this work with the Package Manager in Sublime 3

The `.no-sublime-package` will make the package a [loose package](http://www.sublimetext.com/docs/3/packages.html).

The problem is that ST3 stores package files per default in a single `.sublime-package`-file while ST2 stores the package files in directorys. The extension cannot execute scripts from inside the `.sublime-package` file. Thats why the `.no-sublime-package` is needed. The `.no-sublime-package` makes the package a loose package and all package files are stored in directorys again, like on ST2.

This pull request will fix issue #22 and issue #30.

P.S.: Please dont forget to create a new version-tag like `1.7.0` after merge :)