Apertium: Use the APY API running on apertium.wmflabs.org

Change-Id: I6518a891034122646e4f0e19110eae74ba7182a8
Config: Flatten the config file, remove usage of args

All cxserver configuration in config.js / config.defaults.js .

Change-Id: I1343b797f49f80588721013595e9748cd2de91b3