Increase maxgr to 15000
Merge pull request #101 from mandli/increase-maxgr

Increase `maxgr` parameter to 15000
fixed call to src2 calling sequence from stepgrid to close #102
Merge pull request #103 from rjleveque/fix_src2_call

fixed call to src2 calling sequence from stepgrid
Increase number of output values to 50
Merge pull request #106 from mandli/increase-values-per-line

Increase number of output values to 50