Split format:words:pointers:weak: into Spur and SqueakV3 halves, selected from vmmaker isSpur.  Needs NewspeakCore-eliot.76 for isSpur.
Modify KernelForSqueak for Spur Behavior format encoding.
Merge
Added tag G74 for changeset b74436d11cbd
Inital Merge
final bit of the spur/stable merge
Merge
Fix the Newspeak version of NOF to work on Spur.
Make Behavior isBits answer true for immediates.
Generate isFoo ^false methods from a template so they will use the same bytecode set that the kernel was compiled with.
Remove leftover from NS2-NS3 transition.