Add link to share via twitter to "created project" event.

app/assets/stylesheets/sections/events.scss

app/controllers/admin/application_settings_controller.rb

app/helpers/application_settings_helper.rb

app/models/application_setting.rb

app/views/admin/application_settings/_form.html.haml

app/views/events/_event.html.haml

app/views/events/event/_created_project.html.haml

config/initializers/1_settings.rb

...43_add_twitter_sharing_enabled_to_application_settings.rb

db/schema.rb