README Update: Glossary

[cmalinmayor]

Move glossary to separate page and add additional terms including:

• Node
• Edge
• Segmentation (mask)
• Detection
• Frame buffer (or whatever term we decide to use for the concept of matching divisions within N time points)
• Predecessor
• Successor
• Division (e.g. if we retrieve divisions from the graph, we get the parent cell)
• Error (things like FP, FN that we annotate on the graph)
• Metric (can be simple error counts, more complicated equations, or be related to where the errors are on the graph structure) Would also be amazing to standardize the use of these terms throughout the actual code in the repository. For example, "ground truth" vs "reference" and "prediction" vs "reconstruction". This could perhaps be a new issue once we decide on the terms we will use in the Glossary. Same goes for standardizing the use of abbreviations (or not) in function and variable names.

[msschwartz21]

Update tracklet = track and track = lineage