Fixing typo / Removing old distro

It's a fairly common mistake to spell the word "licença" as licensa (specially when translating a document from English).

As for the removal of the Kurumin distro, it's a long gone distro. It could lead newcomers to use old software (if they can find the link to download it anywhere). As you can see here, http://en.wikipedia.org/wiki/Kurumin, its latest release was in 2008.