Fit global epistasis models

• LibA_2021-10-28_thaw-3_VSVG_control_1_vs_2022-02-10a_thaw-3_no-antibody_control_1

• LibA_2021-10-28_thaw-3_VSVG_control_1_vs_2022-03-02_thaw-3_no-antibody_control_1

• LibA_2021-10-28_thaw-3_VSVG_control_2_vs_2022-02-10a_thaw-3_no-antibody_control_2

• LibA_2021-10-28_thaw-3_VSVG_control_2_vs_2022-03-02_thaw-3_no-antibody_control_2

• LibB_2021-10-28_thaw-3_VSVG_control_1_vs_2022-03-02_thaw-3_no-antibody_control_1