Kernel: Use a multiboot header instead of a convoluted two-part bootloader.

The old bootloader was hilariously complicated, requiring a floppy disk with
the kernel on it, and a hard drive with the file system. This patch removes
the floppy disk from the equation and replaces it with a multiboot header.
This means the kernel can now be booted with qemu-system-i386 -kernel kernel

Kernel/linker.ld

@@ -1,44 +1,29 @@
-/* The bootloader will look at this image and start execution at the symbol
-   designated as the entry point. */
-ENTRY(_start)
+ENTRY(start)
 
-/* Tell where the various sections of the object files will be put in the final
-   kernel image. */
 SECTIONS
 {
-	/* Begin putting sections at 1 MiB, a conventional place for kernels to be
-	   loaded at by the bootloader. */
 	. = 0x10000;
 
-	/* First put the multiboot header, as it is required to be put very early
-	   early in the image or the bootloader won't recognize the file format.
-	   Next we'll put the .text section. */
 	.text BLOCK(4K) : ALIGN(4K)
 	{
-        _start.o
+        Boot/boot.ao
 		*(.multiboot)
 		*(.text)
 	}
 
-	/* Read-only data. */
 	.rodata BLOCK(4K) : ALIGN(4K)
 	{
 		*(.rodata)
 	}
 
-	/* Read-write data (initialized) */
 	.data BLOCK(4K) : ALIGN(4K)
 	{
 		*(.data)
 	}
 
-	/* Read-write data (uninitialized) and stack */
 	.bss BLOCK(4K) : ALIGN(4K)
 	{
 		*(COMMON)
 		*(.bss)
 	}
-
-	/* The compiler may produce other sections, by default it will put them in
-	   a segment with the same name. Simply add stuff here as needed. */
 }