Fix formatting error in readme, credit translator.

git-svn-id: https://plugins.svn.wordpress.org/wp-fetlife-importer/trunk@966630 b8457f37-d9ea-0310-8a92-e5e31aec5664
Use correct text domain for translated strings.

git-svn-id: https://plugins.svn.wordpress.org/wp-fetlife-importer/trunk@966631 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add Spanish translation.

git-svn-id: https://plugins.svn.wordpress.org/wp-fetlife-importer/trunk@966633 b8457f37-d9ea-0310-8a92-e5e31aec5664