Added "target_teardown" functions to every target that "clean up" after the script has gotten to that step to avoid overflow of scratch space. Fixed a typo that was causing a key error in Base Recalibration. 
Added "target_teardown" functions to every target that "clean up" after
the script has gotten to that step to avoid overflow of scratch space.
Fixed a typo that was causing a key error in Base Recalibration. 
fnothaft/toil-scripts,jpfeil/toil-scripts,jpfeil/toil-scripts,BD2KGenomics/toil-scripts,fnothaft/toil-scripts,BD2KGenomics/toil-scripts