improved error handling for NULL pk values when importing data
use locale English for lowercase of default match_type of match predicate
Merge pull request #1195 from crate/h/no-pk-exception

improved error handling for NULL pk values when importing data
add schemaInfo to TableInfo interface

in order to streamline the Analysis classes in preparation
for Relation/Join support
implemented where clause splitter
Merge pull request #1198 from crate/m/where_splitter

implemented where clause splitter
add a class to generate joinRelations from a list of analyzed relations

to rewrite select * from a, b -> select * from a cross join b
(and possible other join types in the future)