Add a make_imports argument to config(), make(), outdated(), max_useful_jobs(), etc.

[wlandau-lilly]

Any time an internal config list is created, make_imports() is called, even when this is not necessary. Sometimes, you know you work is up to date and you just want a quick graph. The make_imports argument will give the user control over this behavior. Similar behavior used to be in effect, but I dropped the ball when I was working on #121.

Also, this line in dataframes_graph() can be changed from config$outdated <- plan$target to config$outdated <- outdated(config = config, make_imports = FALSE).

[wlandau-lilly]

Functions affected:

• make
• config
• outdated
• max_useful_jobs
• predict_runtime
• rate_limiting_times
• plot_graph
• dataframes_graph

There may be more that I cannot recall at the moment.