Merge pull request #3 from jmontoyaa/1.9.x

Updating lang variables (greek)
Merge pull request #5 from jmontoyaa/1.9.x

Minor cosmetic changes
Merge pull request #6 from jmontoyaa/1.9.x

Fixing lang var see #6002
Minor - Added internationalization_database directory ignore directive in build.xml
Minor - Change of syntax to avoid fatal error in phpunit tests
Minor - Added inclusion of database lib in unit test to avoid fatal error
Removed test on Accessurleditsessions as it slows down considerably the testing process
Minor fix for phpunit
fixing error uploading file #6034
fixing survey orientation 5956
Mark messages as read and unread 6019
Minor - Fixed issues with unit tests in usermanager
Merge pull request #11 from ycastillo/yoselyn.dropbox

fixing error uploading file #6034
Merge pull request #12 from ycastillo/yoselyn.survey1

fixing survey orientation 5956
Merge pull request #13 from ycastillo/yoselyn.message

Mark messages as read and unread 6019
Changing URL sent to user see #6113
Social Add friends #6015
Merge pull request #17 from ycastillo/yoselyn.social

Social Add friends #6015
fixing radio selected in group_category.php #5625
Merge pull request #19 from ycastillo/yoselyn.group_category

fixing radio selected in group_category.php #5625