replace cython compiled extensions for rainflow counting with numba jit, which...

pyproject.template

setup.py

wetb/fatigue_tools/fatigue.py

wetb/fatigue_tools/rainflowcounting/pair_range.py

wetb/fatigue_tools/rainflowcounting/pair_range.pyx

wetb/fatigue_tools/rainflowcounting/peak_trough.py

wetb/fatigue_tools/rainflowcounting/peak_trough.pyx

wetb/fatigue_tools/rainflowcounting/rainflowcount.py

wetb/fatigue_tools/rainflowcounting/rainflowcount_astm.py

wetb/fatigue_tools/rainflowcounting/rainflowcount_astm.pyx

wetb/hawc2/hawc2_input_writer.py

wetb/hawc2/htc_contents.py