7.2-alpha2

Changes

• Add MIPS support
• Add better support for m68k
• Add "const" to first parameter of load calls
• Add parentheses around address argument for various macros
• Add some platform-specific documentation to INSTALL
• Add untested 64-bit support for PowerPC
• Fix AO_compare_and_swap_double_acquire
• Fix AO_int_fetch_and_add_full (x86_64)
• Fix comments
• Fix s390 include paths
• Fix use of lwz instruction (PowerPC)
• Refine clobbers (PowerPC)
• Remove outdated info about Windows support in README
• Replace K&R-style function definition with ANSI C one
• add AO_compare_double_and_swap_double for ARMv6
• gcc/powerpc.h: Consider NO_LWSYNC