add broken test for having
correctly track input columns for having clauses in group by queries
Fix: Changed output of column names in error
messages to subscript notation, so the correct
notation to address columns in sql is reflected
documented that updating minor and major versions
is critical and that the user has to check the
update path.
Fix: Added comments to the logging.yml config file
and reduced the amount of log entries by changing
the loglevel of some log messages
fix plan of non distributed group by queries

and separate the planning process into two methods to reduce if/else shizzle
Merge pull request #1465 from crate/m/non_distributed_group_by_fix

fix plan of non distributed group by queries
catch CollectionAbortedException in LuceneDocCollector
improve error messages on copy to and copy from