Revert "StereoModel: Code for computing intersection of three rays"

This reverts commit f5fc52a2626b02832cce14c15846ee85e99bab17.
Revert "More API generalization for n cameras"

This reverts commit 3d12cfb5186975dffbc834cc0281c85f839c3f0b.
Revert "Map2CamTrans: Pass in file name rather than tmp resource handle"

This reverts commit 4a58e958536cc6db1a14770e970e178ad0ed14b3.
Revert "StereoModel: Step towards multiview"

This reverts commit c1080e7a7890c80eed7b9047dffbc9e7ac2ecb83.
Revert "Map2CamTrans: Rm unneeded difficult to copy member"

This reverts commit 011a149a3dad929233b86a03acfd0d8551dfe265.