added jquery datepicker
Merge remote-tracking branch 'origin/master' into new_poll_design

Conflicts:
	app/assets/javascripts/application.js
ajout de timepicker, datepicker, modal directive, timepicker directive, shuffle utility method, and new poll modal popup
forgot a file in last commit
code reinforcement, default values, bug fix on timePicker value not beeing updated properly.
added new field event_date in Poll
can now save a new poll ( known bug when trying to redirect after the creation)
fixed redirection problem
added date.js library
eventDate and time is now merged in javascript to be able to save the time in GMT on server side.
added default options for eventDate (today) and eventTime (12:00pm)
all data is loaded and calculated before the new poll popup shows up
css of new_poll_form
bug fix when creating a new poll
forgot a file in last commit
review of PR #29
localisation of poll form
Merge pull request #29 from mllm/new_poll_design

New poll design