Change configuration to get xhprof working in prod and console

In production env, we have to pass the _profile query parameter
to have it working, in console env, we'll use --profile argument.
First test with ZendDb
Continue the work
Finish first test with ZendDb
Cleanup
Add infos on memory
A try with eadheader on repulish
Factorize memory consumption display
Set PHP 5.4 as minimum required version
Archdesc and fragments (re)publication
A try with matricules
Use ZendDb to publish matricules and to handle documents