profiling teeMod

Today, I learned how to use RStudio, including how to profile a testthat file inside RStudio, namely [tests/testthat/test.teeMod.R](https://github.com/benbhansen-stats/propertee/blob/840b84996427f12237fee81d50cce1bc99e8383c/tests/testthat/test.teeMod.R)

The goal is to find areas in the relevant code that could be made more time efficient and work on those.

Here is a first step toward identifying good candidates.


When I start making changes to the code, I will put the changes in a new branch, push the branch to GitHub, and post the name of the new branch here.