Make joins although search is empty
Use PSR-4
Merge pull request #6 from billmn/psr-4

Use PSR-4
Revert "Merge pull request #6 from billmn/psr-4"

This reverts commit 6d67bdcc91e73d21c244060c83a301ff8c136d87, reversing
changes made to 994c1f1f9400cdd040ae7c7d3967a19e6f1d37ec.
Merge pull request #7 from billmn/patch-join

Make joins although search is empty
Make select and join to empty searches too