Update build settings to require ArcGIS API 3.4 for Flex.
Increment widget metadata file to reflect ArcGIS API 3.4 for Flex.
Updated change log to include version 3.4 details.
Merge branch '#8/update-to-require-arcgis-flex-3.4' into develop
Issue #14:  Fix issue where _featureSet was not being assigned in query complete handler.