Use LiftSynchronizerAdjunct for Send/Receive operations on LIFT

This class was created in Chorus some months ago to customize the S/R
for LIFT, in particular using the right branch for the current LIFT version,
but WeSay was not configured to use it.
Make test setup create a dummy lift ranges file

LiftSynchronizerAdjunct requires this; makes unit tests pass
Adding .gitattributes and .gitignore files

This is in preparation for the migration to git.