Specify root as the starting point for the linux compiler path

Add catmanl + fix broken redirects

* Updated QOI to latest version.

* Enable back QOI support!

* Stray extra space! Should be good now.

Justification: original comment said the following
"TODO: Add other platforms. Remove sudo requirement, i.e. add USER mode."

For the other platforms part, installing is included on unix-like
systems, so for example Windows doesn't have a path where to install
libraries.

Removing the requirement for sudo is also quite contradictory since
we're writing files to directories which require root. Not sure what the
original commiter meant by USER mode.

Added a note for a future improvement

Co-authored-by: Jeffery Myers <JefMyers@blizzard.com>

Built files should be put into src/ not into the project root
as it was now on these platforms

* Update struct parser to parse from lines buffer

* Parse struct description

* Fix erroneous comment

* Parse enum descriptions and value descriptions

* Put braces on newline

* Properly escape strings

* Realise that XML doesn't actually need backslash escapes

* Replace FPrintfEscapes with EscapeBackslashes

* Remove #include <stdarg.h>

* Update EscapeBackslashes description

* Fixed functions Vector2Angle and Vector3Angle

* typo

* Unrolled everything.