Do not call preventDefault on right and middle-click/Ctrl+click.

This should fix the middle click popup blocker issue on Firefox.
Upgraded rails to 4.0.4
Use sass-rails 4.0.2
Update client.it.yml
Update server.it.yml
Create client.it.yml
Create server.it.yml
Fix poll server.it.yml
Merge pull request #2157 from Aselox/master

Updated Italian Translation + added Italian poll locales
Merge pull request #2138 from chancancode/upgrade_4_0_4

Upgraded rails to 4.0.4
Merge pull request #2118 from vikhyat/firefox-middle-click

Fix Firefox middle-click popup blocker issue
thread_safe 0.3.0 DoA