0.5.0-rc4

Add dsq binary for running SQL queries against files (#127)

* Start on dsq

* Continue sketching out dsq

* More sketching

* Refactoring to support dsq

* Working with hardcoded shape

* Clean up

* Fix for shape guesser

* Fix for format

* Go doesnt support graph or table yet

* Fix build scripts for new binary

* Fixes for build

* More fixes