Update documentation.

- Convert http to https, provide archive link when possible.
- Made CPU-JIT.png more readable on dark themes;
Added a white background so there isn't black text on a black
background.

src/xenia/kernel/xam/apps/xmp_app.h

@@ -25,7 +25,7 @@ namespace xam {
 namespace apps {
 
 // Only source of docs for a lot of these functions:
-// http://freestyledash.googlecode.com/svn-history/r1/trunk/Freestyle/Scenes/Media/Music/ScnMusic.cpp
+// https://github.com/oukiar/freestyledash/blob/master/Freestyle/Scenes/Media/Music/ScnMusic.cpp
 
 class XmpApp : public App {
  public: