add support for tables aliases in SELECT, UPDATE, and DELETE clauses.
Merge pull request #740 from crate/l/table-alias

add support for tables aliases in SELECT, UPDATE, and DELETE clauses.
increase debug output
Merge pull request #744 from crate/m/debug_output

increase debug output
remove unused ColumnProjection
moved sql xcontent parsing to rest action
client depends only on 'shared' resources from 'sql' package now
exclude duplicates at client jar task