added new 'total_data_failure_tolerance' to let you set a bound on the sum of epsilon and finitness-mismatch failures (ie. all points that were bad because of the data itself)

git-svn-id: https://svn.ssec.wisc.edu/repos/glance/trunk@123 8a9318a1-56ba-4d59-b755-99d26321be01