Updates to inference pipeline
I decided to test activity detection instead of going forward with clustering the kinematics data.
This merge includes updates for:
- kinematics feature extraction: cross-correlation individually on sample channels and jointly on sample norms
- activity detection: basic thresholding on sample norms of kinematic features
- data visualization: raw data, kinematics features, annotated labels
- parallel processing: do trial-level computations in parallel (except for drawing figures; python crashes for some reason)