Fixed bad block select code. Added input checks and case statements
RAID10. Fixed a few bugs. Compiles. NOT TESTED
RAID4. Compiles. Untested.
Added ERROR print to write fails
latest working
Passing tests but Seg faults on 4 and 5
Merge remote-tracking branch 'upstream/master'

Conflicts:
	disk-array.o
	disk.o
	main.c
	main.o
	raidsim