naming confusion

[hackergrrl]

naming confusion for "progress state" vs. "accumulated view state", and an example of each since they go in different parts of the code

I think the confusion was in the storeState/fetchState functions. The current API and docs don't clearly distinguish "view state" (the stuff that the view accumulates from log data) from "indexing state" (the data the indexer needs to store so it can pick up indexing where it left off last time).