Sub-minute tracking support
Added sub-minute tracking support on all feature tracking.
- The intermediate and final pixel-level mask files now have seconds in the filenames (e.g., yyyymmdd_hhmmss).
- Analysis and visualization codes have been updated to work with the new files.
- Added MCS tracking using collocated Tb + 3D radar reflectivity + precipitation.
- Added generic 2D feature tracking with two methods to define objects.