Solving for camera rotation
Instead of spherically warping the images and
solving for translation, we can directly solve
for the rotation Rj of each camera
Can handle tilt / twist
C:\snavely\tmp\test\samplePanos\MS_Lobby\DSC00021.jpg C:\snavely\tmp\test\samplePanos\MS_Lobby\DSC00045.jpg C:\snavely\tmp\test\samplePanos\MS_Lobby\DSC00046.jpg
C:\snavely\tmp\test\samplePanos\MS_Lobby\DSC00046.jpg