Scripts for managing and processing logs parameterized

[rayvburn]

• Aim is to avoid copying each script to log directories. Instead, all logs now take parameters that define where are the logs etc.

• Deleted evaluate_newest as its functionality would be the same as evaluate_from_dir's after parameterization

• Resolves #26

• Resolves #31

• Resolves #17

• Related to #25

[rayvburn]

FIXME: create_bar_plot_from_results.py script does not handle multiple input sheets well. Traceback:

Traceback (most recent call last):
  File "srpb_evaluation/scripts/create_bar_plot_from_results.py", line 260, in <module>
    metric_name, planner_values = prepare_data_for_plotting(data_selected)
  File "srpb_evaluation/scripts/create_bar_plot_from_results.py", line 58, in prepare_data_for_plotting
    ] for planner in planner_names
  File "srpb_evaluation/scripts/create_bar_plot_from_results.py", line 58, in <dictcomp>
    ] for planner in planner_names
  File "srpb_evaluation/scripts/create_bar_plot_from_results.py", line 57, in <listcomp>
    for metric in metric_names
TypeError: 'NoneType' object is not subscriptable

EDIT: it might not be the case of loading multiple sheets but rather loading sheets with invalid data (e.g., all trials failed)