Hux v0.1.1

Change log:

• Add QEMU VNC option for non-graphical dev environments
• Add seek syscall
• Implement more user utilities: mk, rm, put, and cat
• Change the calculation of the start address of kheap: instead of using the end of .shstrtab section (which might not be the highest section in all cases), loop through all kernel elf sections to get the true end address
• Other minor fixes