[#2477] Adding presence_start_end.html and adding new tab in other html files
[#2477] Fixing href in mean_time_weekday.html
Merge branch 'master' into bug_2477
[#2477] Adding presence_start_end handler and new flask view
[#2477] Fixing pylints, adding tests
[#2477] Changing docstrings for test cases
[#2477] Fixing code style
[#2477] Fixing code style in tests
Merge pull request #3 from drudkiewicz/bug_2477

[#2477] Nowy ekran - timeline.