compressed pk3 support tutorial for standard quake soonish

[revelator]

writing a text at home so this doesnt happen again

tbh i suspect it might be a bit much to take in at once the changes
affect the entire engine so its not something you just copy pasta

and believe me i do mean everything

i have a global file pointer as an int that pipes all data into the filesystem which in turn means that every FILE * pointer needs to be changed to take advantage of this system.

its probably the biggest modification i ever made.

also theres numerous changes nessesary to the sound system ie. caching is done a whole different way now (using pointers into virtual memory) instead of a static array.

i should probably start out with the memory modifications else people will fast loose track ?