Add simple_form gem
`rails g simple_form:install --bootstrap` and tweak the config files
Use simple_form in registration form
Use simple_form in new event form
simple_form translations
manually set time zone

refs https://github.com/rails/rails/issues/8711
Upgrade Rails to 3.2.10 for security fix

http://weblog.rubyonrails.org/2013/1/2/Rails-3-2-10--3-1-9--and-3-0-18-have-been-released/
Merge pull request #158 from doitian/rails-upgrade-to-3.2.10

Upgrade Rails to 3.2.10 for security fix
Merge pull request #155 from doitian/bug/time-zone-setting

manually set time zone
add responsibility description for nightire. #143
Merge branch 'simple_form' of github.com:doitian/19wu into doitian-simple_form
add responsibility description for doitian. #143
#14: activate registered user
#14: change test codes according to user activation work flow
#14: improve user registration test case by adding user activation testing codes
merge conflicts with last commits