Create summarize_glm_count.R from RATET01 design doc

[brandondbutcher]

Motivation

This is part of adding the new template RATET01, see #319

To-Do:

Pull code out of design doc (tern/design/design_ratet01.Rmd) and put into separate file, summarize_glm_count.R

• Helper functions: h_glm_quasipoisson, h_glm_poisson, h_glm_ppmeans, & h_glm_count
• Statistics function: s_glm_count
• Analysis function: a_glm_count
• Summarize function: summarize_glm_count
• Add annotations in summarize_glm_count.R for documentation. See summarize_ancova.R for examples.
• Create unit tests

DO NOT include h_glm_negbin helper function for the first iteration of this implementation.

[brandondbutcher]

@ayogasekaram, I've updated the issue To-Do.

[shajoezhu]

Hi @brandondbutcher , hope you are well. Just want to quickly check in how is this issue going? Thanks