Log fold change

[cansavvy]

# Description This step has now been split into two main functions! `gimap_normalize()` and `calc_crispr()` are the new stuff here. Here is how I test this overall: ``` gimap_dataset <- get_example_data("gimap") %>% gimap_filter() %>% gimap_annotate() %>% gimap_normalize( timepoints = "day", replicates = "rep") ``` ## Instructions for Reviewers I have a series of TODOs in the code that ask questions -- either the Berger Lab can help us answer or @kweav if you have insights that's great too. Besides just carefully scrutinizing this and seeing if it more or less is giving the same story as the original code. A big piece here is that it will need to be re-run once we have filtering steps ready.