ffopportunity (development version)

Added a NEWS.md file to track changes to the package.
Added ep_build() and initial subfunctions to preprocess, predict, and summarise EP
Added ep_load_*() to download release data
Added update/ script that uses piggyback to update release data
Offloaded models to releases ("latest-models", "v1.0.0-models")
Added download of models to user cache
Combine variants of ep_load into one function ep_load() with arguments
Rename to ffopportunity
Include spikes and kneel downs to tie out to official stats with ep_summarize()
Fix YAC bug in pbp_pass data

Provide feedback