New perf-opencsd repo on gitHub

Good day all,

As discussed in the meeting yesterday I have started a new gitHub repository [1] to host the perf-opencsd kernel. Right now it has all the same kernel branches as found on the openCSD repository. I have also added a small wiki that gives people a little bit of information on the repository itself. Note that the openCSD repository hasn't been modified yet and that *everything* in the perf-opencsd is currently considered experimental. I am sharing this early to give people a chance to comment on the structure, naming and whatever they want to see modified.

Regards, Mathieu

[1]. https://github.com/Linaro/perf-opencsd