adding html file for new view, adding li for previous views
* grouping of starts and end by weekday in utils
* api method for mean of starts and ends by weekday
dealing with ajax request
mean start and end sent by api only if there is at least one input time for given day and user
pep8-ification
group_starts... and group_ends... combined in group_times...
another aproach for importing utils in views
buildout
adding test for api method
Merge branch 'master' into bug_1413
Merge pull request #3 from magul/bug_1413

Bug 1413
Merge branch 'master' of https://github.com/stxnext-kindergarten/presence-analyzer-tmagulski