started creating some tests
tcx sequence argument in a better spot
Add a temporary experiment in calculating laps to tcx.py
Lap and LapList improvements, mainly as_miles
checkpoint - in progress reworking of runwalk.py
checkpoint: test formatting in examples
checkpoint: __init__ changed

So some imports had to change. Add some formatting tests, but runwalk
tests are broken.
created a simple TestLaps
run_walk_split experiments in testing

also run_walk_format