Add captive breeding module to CLI and Shiny

[psolymos]

• [x] Develop CLI version for captive and recipient populations
• [x] Develop wrapper function to evaluate options (i.e. after x years can we donate y bous)
• [x] Design Shiny logic and add it as separate app

[psolymos]

We want to add a certain number of caribou to the captive breeding pen. Once the pen has a specified number of animals (let's go with 60 for now, maybe the user could define or we can play with this), it starts to export the excess animals. That those "transfer" animals go into a recipient herd.

A table would show, over time (t-tmax, let's say 50 years for now), the # going INTO the breeding facility, the number going OUT OF the breeding facility, the # going INTO the recipient herd, the total pop size of the breeding facility, and the total pop size of the recipient herd. Then, a summary plot to show the #animals in the recipient herd over time.

In the captive breeding pen just add removal columns for each year and call them properly.

In the recipient herd, get it to a stable state first, Gives you the stable age distribution at last time column, copy that over into NT1 (starting at about 100 caribou). Then it starts at year 1 of the adds (i.e. once captive breeding outputs begin). Add an “add” column and make sure the column formulas are correct (note that the year 0s should always grab the previous total).