add authenticate route
add lodash
add request module
add googleOauth service
add querystring module
add routes /authenticate & /authenticate/callback
setup googleOauth page redirection on /authenticate
add method to exchange google auth code for tokens
add express session
save tokens in session
handle errors a bit more properly
Merge branch 'feature/auth' into develop
add calendars route
small refactor
get calendars list from Google
add data mapper
calendars results converted
add events draft
improve mapping
Merge branch 'feature/calendar' into develop
handle use of refresh token if needed
add middleware to handle tokens handling
refacto Google api wrapper
Improve google API request error handling
some cleaning
Merge branch 'feature/refactorization' into develop