upgrade crate client and crate (testing) to 0.39.1
include gradle sources
fix excluding nested columns from getColumns
increase crate version to 0.39.2
update gradle to 1.12
increase crate version to 0.39.3
Merge pull request #21 from crate/m/crate_0.39.X

M/crate 0.39.x
updated crate-client dependency to 0.39.1
updated client version
added support for jdbc:crate: url prefix