Finalize package

[ghost]

A number of tasks that need to be done once all of the functions are completed:

• [ ] flow chart diagram of how functions interact
• [ ] create vignette
• [ ] make sure every function has information written using roxygen code
• [ ] add test data set, use testthat package to make sure code works
• [ ] devtools::check() passes
• [ ] ensure all packages external to atlantisom are listed in Imports in the DESCRIPTION file
• [ ] each function must use @importFrom or :: to reference functions from packages listed in the Imports section of the DESCRIPTION file.