added testing.py
Added heel sequence parameters and updated CSV/print outputs to display heel sequences if given. Removed a debug file.

Added heel sequence parameters and updated CSV/print outputs to display heel sequences if given.

Deleted empty testing.py file.
edited position of heel sequence output from end of sequence string to beginning.
Removed case-sensitivity for heel sequences in Primer_design.py, added runner.py

Heel sequences now case insensitive at input; will output whatever case
was input.

Runner.py will run Primer_design.py with preset args for params (used
for my own personal ease-of-use).
Squashed a number of housekeeping commits into a single commit.
Removed erroneously included debug/log files and directories.