modify bu_alloc
modify bu_allocator
Merge branch 'master' of https://github.com/freedombird9/CMPS111-project

odify the bu allocator
change bu_allocator.c ready to debug
Merge branch 'master' of https://github.com/freedombird9/CMPS111-project

Conflicts:
	project3_memory_mng/manager.c
modify buddy allot