Warning checks for "a & b == c" expressions
Function call register save bug
updated crt - added ABI note
Decimal vs Hex output for x86 backend
Merge branch 'experimental/tweaks'

Conflicts:
	lib/arch/x86_64/crt.S
	src/cc1/ops/expr_op.c
	src/cc1/out/x86_64.c
	src/cc1/tree.c
	src/cc1/tree.h