Make Babelium server connection errors non-fatal, when viewing the assignment settings page
Fix warning messages on the assign settings page
Fix Moodle 2.5 compatiblity warning

Note - this fix will cause a warning in Moodle 2.4 and below, so it should only be included in the Moodle 2.5 version of the code
Merge pull request #2 from synergylearning/master

Fix various warnings in Moodle 2.5