WIP -- Correct some possible merge failures in SIMD.cpp
WIP: Create but do not use shapes
Add NewShapeObject intrinsic (unused)
WIP -- create shape objects
Just require proto when creating objects
Stop taking a descr in the intrinsics for creating typed objects
Do not pass descriptor into TypedObjectGet and friends
Change LENGTH field for non-arrays to 1 rather than 0
Add base descriptor to TypedProto
Remove convenience method linking Typed Object to Type Descriptor
Remove typeDescr() method (but not underlying slot yet) from TypedProto