Merge pull request #123 from tunghdt91/task#5628

Task#5628 add start and end at in poll detail page
task#5571 change the way to show voters name in poll details page
Merge pull request #129 from cuongnv540/task_5571

task#5571 change the way to show voters name in poll details page
Task #5656 create drop down notification view (use jquery-bubble)
Merge pull request #130 from wataridori/task#5656

Task #5656 create drop down notification view (use jquery-bubble)
task#5571 change the way to show voters name in poll details page
Merge pull request #131 from cuongnv540/task#5676

task#5571 change the way to show voters name in poll details page
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