Feature/import lst trigger functionality

The below mentioned functionality was added from lst_trigger:
Fitting functions

• fit_trigger_rate_two_exp
• fit_trigger_rate_one_exp
• fit_trigger_rate_sum_exp
• get_fit_range
• mod_exp
• sum_exp\

Plotting

• setup_plotting
• plot_per_sector_rates\

Logging

• setup_logging\

Utilities

• get_module_pixel_map
• get_sector_module_map
• parse_data_file

Closes #1 (closed)