FINALLY Added Disk support!!! f_disk.c name explanation in README.md

Disk reading only, but it works!

docs/main.md

@@ -7,15 +7,16 @@ Well, 32-bit means that it can access $2^{32}$ different memory addresses.
 x86 is the processor architecture it is built upon.
 
 ## Command Line
-Kern uses a command line (for now), so you'll have to type commands to do stuff.
+Kern uses a shell (for now), so you'll have to type commands to do stuff.
 It is currently quite simple. It supports these commands:
 
 - clear: Clears the screen
 - echo <msg>: Prints msg to the screen
-- exit: Shuts down the OS ***(QEMU only!)***
+- exit: Exits the shell
 - help: Prints all available commands
 - ls: Prints all files
 - reboot: Reboots the system
+- test: Tests the newest feature _Debug_
 
 You can also print/run files by typing their filename (More in **Filesystem**)