Added some small optimizations to the jet class (initialize values directly from eigen expressions, instead of creating a temporary). Also changed several variable names from temp to tmp to be consistent with the code base.
Added some small optimizations to the jet class (initialize values
directly from eigen expressions, instead of creating a temporary). Also
changed several variable names from temp to tmp to be consistent with
the code base.

Change-Id: I3f7b834cedca9c4af8e5e086237b40301dbde619

DougFirErickson/ceres-solver,stonier/ceres_solver,timfel/ceres-bin,timfel/ceres-bin,whuaegeanse/ceres-solver,ikoruk/ceres-solver,ikoruk/ceres-solver,entylop/ceres-solver,DougFirErickson/ceres-solver,ikoruk/ceres-solver,ysonggit/ceres-solver,timfel/ceres-bin,stonier/ceres_solver,kartikkumar/ceres-solver,whuaegeanse/ceres-solver,whuaegeanse/ceres-solver,entylop/ceres-solver,entylop/ceres-solver,DougFirErickson/ceres-solver,ysonggit/ceres-solver,ysonggit/ceres-solver,DougFirErickson/ceres-solver,kartikkumar/ceres-solver,entylop/ceres-solver,kartikkumar/ceres-solver,stonier/ceres_solver,ikoruk/ceres-solver,timfel/ceres-bin,stonier/ceres_solver,kartikkumar/ceres-solver,whuaegeanse/ceres-solver,ikoruk/ceres-solver,ysonggit/ceres-solver