WIP: edits to return XML or JSON upon request
 - includes ignoring memcached when property is set
WIP: pull individual page uncompressed
updatin structure works, but some XML attributes need restored
add a merge method to restore the attributes removed
 - only remove and merge attributes on elements with gtapi-trx-id
fix tests
 - returning a entity return type `InputStream` -> `Content`
remove old migration files
put back the method that creates a zipped contents file
 - and use it in the packages & translations endpoint to create a zipped contents file
make it possible to disable onesky integration for non-prod environments
Fully disable memcached integration when property is not set to enable it
 - it was still running inside quartz jobs
give method a better name
 - and use it one more place where it should have been used
Merge pull request #38 from CruGlobal/toggle-onesky

Better control of onesky & memcache integration with properties
Tell memcached to use slf4j facade
 - instead of logging everything to stderr
Merge pull request #40 from CruGlobal/GT-58

GT-58