Defer SingleLineSearch logic to Geocoder component (requires ArcGIS API for Flex 3.2).
Delete unnecessary SingleLineSearch files.
Clean up SingleLineSearch.

* Rename variables.

* Inline method.
Add support for Geocoder properties.
Add support for GeocoderMapService properties.
Add support for GeocoderLocatorService properties.
Move SingleLineSearch into components package.
Add support for using default locator (vs. automatically enabling it if no locators provided).
Merge branch '#51/defer-to-geocoder-component' into develop