add more converter methods and provide a test and example
Merge remote-tracking branch 'origin/add_time_converter_example'

Conflicts:
	modules/standardtime.py
Add div to display the timestamp for each timestep

Add div that updates with the timestamp for each
timestep during animation.
Update animation code to allow multi-layer animation
Add support to reader for timesteps in UTC
On import use full filepath if provided
Return '{}' from reader if timestep is outside range
Merge branch '104-add-animation-timestep-display' into next