[1537] Created: api for start end view, helper function in utils.py. Added new column in presence_weekday.html and mean_time_weekday.html. Edited js in presence_start_end.html
[1537] Added tests to new functions.
Corrected imports and js - used $.each() function.
Added test to new function. Results in gist:
https://gist.github.com/Exorades/0b3d20fdeba2c6ad60ca
[1537] Pep Corrected.
Merge pull request #3 from Exorades/bug_1537

[1537] Created: api for start end view, helper function in utils.py.