Remove "kuksa.val" from files

[erikbosch]

We still have quite many references using the term kuksa.val and also referring to old deprecated kuksa.val repositories. We should better do a search in source code and try to replace all instances of kuksa.val with something else.

[erikbosch]

Will be mostly fixed by #83.

What we might need to discuss (FYI: @SebastianSchildt ) is what to do with old blog posts. I have generally avoided to touch them unless links are permanently broken (and could be removed without making the blogpost useless), but what policy do we want to have, i.e. when shall we remove a blog post.

[SebastianSchildt]

I think blog posts are history, and should stay "as is". The value of updating them is questionable, but I also see no reason to delete them. I think generally people would be able to figure out, the world has moved on

[erikbosch]

I think there is in general is a value if a blogpost is written so it makes sense even if the links are broken. Taking the example below, if one would one would include one or more screenshots in the blogpost then it would make sense to keep it. Now it is not that useless as the link is dead.

https://eclipse-kuksa.github.io/kuksa-website/blog/2018/01/17/2018-01-17-plans/