Fix #146: Alerts are not displayed correctly when signing up
Add some placeholders on the front page
Beautify the 'Update my Account' web page
Merge branch 'develop' of github.com:projectcs13/sensor-cloud-website into sp8.sc1.fixNewStreamForm
Refactor the 'users_helper.rb' file
Polish the form's buttons
Merge branch 'develop' of github.com:projectcs13/sensor-cloud-website into sp8.sc1.fixNewStreamForm