provide a little more involved example
make tests pass with Java 7 as well
fix search with same value in multiple columns
Merge pull request #813 from metamx/better-example-and-test

provide a little more involved example
fix random lowercasing in test
Merge branch 'master' of github.com:metamx/druid into fix-search
Merge pull request #816 from metamx/fix-search

fix search with same value in multiple columns
Merge branch 'master' into fix-datasource-doc
fixed typo and added info that union can take any number of dataSources