Spawn testing

[jcaracappa1]

• Added functions to fetch parameter
• Function get get recruitment calculations (spawn, recruits, SSB): make_recruit_params.R
• Parameter changes in at_biology.prm: Turned B-H recruitment on for everything that was flagrecruit type 11 Turned FSP for those groups up to 0.25 Turned juvenile mQ for those groups to 0 Still need to calibrate

[jcaracappa1]

@gambler1650 @andybeet Still working on this but wanted to get a baseline model that runs to through the end (even if some groups crash). Utility function for spawn and SSB calculations.

[andybeet]

@gambler1650 looks ok to me