sparse_disp: change epipolar test
sparse_disp: change epipolar test

epipolar test now compares ep_dist to the maximum of ep_tol and 0.02*abs(disp-median_disp).  This lets us use a smaller default ep_tol and seems to give cleaner results

aaronknister/StereoPipeline,ScottMcMichael/StereoPipeline,ScottMcMichael/StereoPipeline,njwilson23/StereoPipeline,DougFirErickson/StereoPipeline,njwilson23/StereoPipeline,njwilson23/StereoPipeline,ScottMcMichael/StereoPipeline,njwilson23/StereoPipeline,DougFirErickson/StereoPipeline,oleg-alexandrov/StereoPipeline,ScottMcMichael/StereoPipeline,NeoGeographyToolkit/StereoPipeline,DougFirErickson/StereoPipeline,aaronknister/StereoPipeline,njwilson23/StereoPipeline,aaronknister/StereoPipeline,NeoGeographyToolkit/StereoPipeline,oleg-alexandrov/StereoPipeline,NeoGeographyToolkit/StereoPipeline,DougFirErickson/StereoPipeline,oleg-alexandrov/StereoPipeline,NeoGeographyToolkit/StereoPipeline,DougFirErickson/StereoPipeline,njwilson23/StereoPipeline,oleg-alexandrov/StereoPipeline,NeoGeographyToolkit/StereoPipeline,DougFirErickson/StereoPipeline,aaronknister/StereoPipeline,oleg-alexandrov/StereoPipeline,aaronknister/StereoPipeline,NeoGeographyToolkit/StereoPipeline,oleg-alexandrov/StereoPipeline,ScottMcMichael/StereoPipeline,ScottMcMichael/StereoPipeline