[Completed] Help with compiling SlimKat and adding features

This is purely for my own learning experience..

I'd like to try compiling SlimKat (https://github.com/SlimRoms/platform_manifest)
for my d2lte device as well as maybe adding a few features

(And yes, I know that SlimKat is already available for my device) I just want to try doing this myself...

So I know you need Linux or Mac OSX or Windows with this special program (forgot its name)
I'm using Ubuntu 14 LTS in a virtual machine

The first part I'm unsure about is which source to use. (Slim has 2 links) I know d2lte is a qcom device, but I have no idea if it uses CodeAuroraForum trees. I'm guessing yes? -Because the other link is for non qcom
If so, do I download the source from here? git://github.com/SlimRoms/platform_manifest.git -b kk4.4-caf

-And are the commands Shen using here in Terminal the same for Ubuntu 14 (He's using Ubuntu 10)? http://youtu.be/H_ReU-0w4IE

Also, how would I add something like Screenrecord from ChameleonOS like Carbon did or PAC?
I'm unable to follow this guide: http://xdaforums.com/showthread.php?t=2547196
as I don't understand it...

Before all of this, I will try compiling Cyanogenmod from source just so I can get familiar with this process..
Thanks in advance for any answers I recieve!