Spanish translation for the new strings

git-svn-id: svn://svn.icculus.org/fs2open/trunk@10791 387891d4-d844-0410-90c0-e4c51a9137d3
Fix some issues with the OS X links, and add a mention of OpenAL Soft to the release posts.

git-svn-id: svn://svn.icculus.org/fs2open/trunk@10792 387891d4-d844-0410-90c0-e4c51a9137d3