- Get rid of rotation matrix parameterization, use angle-axis instead. Also Joined rotation and translation into a single parameter block. This made minimization go significantly faster, like 1.3x times in average. - Fix first camera when bundling. This is to address orientation ambiguity. Reconstruction result could still vary in size, but that's another issue to be addressed later. Additional change: Split EuclideanBundleCommonIntrinsics into smaller functions, so it's now a bit easier to follow.