Update CXServer

Changes:
* 4716a4d Remove the unused apertium.py
* 28b6f4e Config: Flatten the config file, remove usage of args
* f5e5d54 Apertium: Use the APY API running on apertium.wmflabs.org
* f617f36 Moved testApertium.js to better place
* 996498b Fix socket errors: buffer Apertium stdout

Change-Id: I5c5989c8424119ee498ee0c04efcb70b4f5c76a4