change bounds in bin
try to fix blank groups error
Revert "change bounds in bin"

This reverts commit 210cc0ec2619c9c9264abd0ce338f78ef11458d0.
Revert "Revert "change bounds in bin""

This reverts commit 4bff62d36693c2c877c60928b3be0a5d4585685d.
Revert "try to fix blank groups error"

This reverts commit b915fc4dd86e00bcecf6fc94722352b30e39aa96.
add bin_2d, and output_2d_hist
fix backup_file bug
create new wrappers for hist
add dpca do, fix errors
trying to get hist 2d functions to work
improve 2d hist output
tweak output
add option to pass lower, upper, total for bin