Factor out getting state bools to a overridable method
Factor out Scs107 processing to get_state_times_bools; fix latent bugs in get_msids_states
Add simple HETG and LETG move events
Factor out msidset interpolation into a separate function
Add HETG / LETG events based on software status telem
Merge pull request #8 from sot/gratings

Add grating motion events