add version 6 of jointspace

[bvdbos]

This version uses a password, see:
https://forum.athom.com/discussion/comment/54289/#Comment_54289

[bvdbos]

@suborb didn't have much luck with it yet..
suborb/philips_android_tv#3

[lucasvdh]

@bvdbos Arzzen recently made a bash script with a concrete example of the JointSpace v6 implementation. See arzzen/philips-tv. It seems simple enough. If I have some time free this weekend I'll have a look at how this can be added.

However, is this repository still being maintained @johnsmarius? I'd be happy to contribute and write a PR, but not if nobody is going to look at it.