added lots links to blogs, video tutorials and other resources
Merge pull request #9 from redFrik/patch-1

added lots links to blogs, video tutorials and other resources
Merge pull request #10 from redFrik/master

adding info on how to build from source on raspberry pi and beaglebone black
Update building-beagleboneblack.md
Update building-raspberrypi.md
Update git-cheat-sheet.md
made links links with [] and ()
Merge pull request #11 from redFrik/master

adding info about jack permissions and other minor improvements
Merge pull request #12 from redFrik/patch-2

made links links with [] and ()
added backtrace blog
replaced []() with single <>

so that links not need repeating
changed temporarily to a specific sc git commit