Merge pull request #34 from hananils/integration

Stop using the deprecated buildDSRetrivalSQL function. Fixes #33
Update call to buildDSRetrievalSQL instead of typo'd method name
Merge branch 'integration' of https://github.com/brendo/uniondatasource into integration
Merge pull request #36 from hananils/integration

Interface updates for Symphony 2.4
Change Union DS to support 2.4 negation/forbidden/pagination parameters
Update to 1.1beta1
Display sorting context