Merge the add predation branch back to master

Created new predator models and a shiny interface.

Update plot_predation_stage_prop.R, plot_predation_prop.R, plot_predation_params.R, plot_predator_prey_pop.R, plot_predation_deaths.R, cwd_detmod_predation_late.R, launchApp.R, pred_params_runmod.R, allocate_deaths.r, cwd_det_model_fxn.r, cwd_det_model_wiw_fxn.r, cwd_stoch_model_fxn.r, cwd_stoch_model_wiw_fxn.r, cwd_stoch_wiw_wrapper.r, cwd_stoch_wrapper.r, CWDsims.r, est_beta_params.r, globals.R, plot_age_dist.r, plot_buck_doe.r, plot_compare_all_det.r, plot_compare_all_stoch.R, plot_compare_hunted.r, plot_compare_prev.r, plot_compare_tots.r, plot_deaths.r, plot_fawn_doe.r, plot_prev_age_end.r, plot_prev_time.r, plot_stoch_age_dist.r, plot_stoch_buck_doe.r, plot_stoch_deaths.r, plot_stoch_disease.r, plot_stoch_fawn_doe.r, plot_stoch_perc_deaths.r, plot_stoch_prev_age_end.r, plot_stoch_prev_age.r, plot_stoch_prev.R, plot_stoch_tots.r, plot_tots.r, plot_ttd.r, plot_vitals.r, R0_NGM.R