[Arm-dev] Updated CentOS arm guide - please review

I have updated my Centos arm guide:

http://medon.htt-consult.com/CentOS7-armv7.html

Note the case change per Pablo's request, and thus it is not yet linked in from the home page.

I added a number of sections.

A pointer to the Odroid HC1 page.  I will work on this so it stands out more. Xfce desktop zram for swap - note that the repo listed does not work.  Waiting on guidance from Marc on this one. Improvements on the Remote Management to support VNC to an Xfce desktop

I will link this in once Pablo has the new image in production and at least the zram access works.

thanks in advance for all comments