Add comments of Daniel in Wed 2.7

See merge request !44

1. add more config options
2. add readme
3. footer format is updated.

1. log logic changed
2. number of cells, lines and bytes are added in the log
3. config_sync is added
4. convert to html is now available
5. change detection algorithm is updated

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# Conflicts:
#   synced_files/GA_1_7/Solution/Discharge/Analysis_discharge_solution.ipynb
#   synced_files/GA_1_7/Solution/Emissions/Analysis_emissions_solution.ipynb
#   synced_files/GA_1_7/Solution/Force/Analysis_force_solution.ipynb
#   synced_files/GA_1_7/Student/Discharge/Analysis_discharge.ipynb
#   synced_files/GA_1_7/Student/Emissions/Analysis_emissions.ipynb
#   synced_files/GA_1_7/Student/Force/Analysis_force.ipynb
#   synced_files/GA_1_7/Unused/Temp/Distribution_Fitting_T.ipynb
#   synced_files/Week_2_2/old/PA_2_1_solution_sympy.ipynb
#   synced_files/Week_2_2/old/old_PA10_solution_sympy.ipynb
#   synced_files/Week_2_7/WS_2_7_solution.ipynb
#   synced_files/Week_2_7/WS_2_7_student.ipynb

updated README file

See merge request !41