perfomance changes, move to postgres, get logbooks without logs so when persist it will not cause a big delay, unit test behind it
add psql sql
update the logmanager since psql do not allow  non-standard groups by
use inner joins when possible since they are faster, findlogbookbyname will return a unique logbook since there is a unique constrain on it
remove useless iteration
after benchmark use left joins
mock the persistance so it can use my persistance.xml for test
set a hardcoded limit to the number of logs client can retrieve
put back version #
comment remove special characters, put back when using psql
set the sql to be pick by Flyway:
remove copy
Merge pull request #8 from eschuhmacher/master

Performance improves