Updated the Galician (gl) translation
Merge pull request #4260 from Gallaecio/gl

Updated the Galician (gl) translation
bump recommended Ruby version to 1.9.3-p448

See http://www.ruby-lang.org/en/news/2013/06/27/hostname-check-bypassing-vulnerability-in-openssl-client-cve-2013-4073/
Drop weird stop in conversations controller spec
... and make the specs actually pass
Improve participants link style in conversation, close #4236

Move it to the right and replace the text by an image with the nice tooltip, modify the test.
Merge pull request #4238 from Flaburgan/patch-4

Improve participants link style, close #4236
remove restriction on guid length