Merged in feature/document (pull request #36)

Document CRUD

* doccreate

* dochashlocandget

* depsandtodo

database/queries/document.sql

@@ -1,5 +1,5 @@
 -- name: GetDocument :one
-SELECT id, jobId FROM documents WHERE id = $1 LIMIT 1;
+SELECT id, jobId, hash, location FROM documents WHERE id = $1 LIMIT 1;
 
 -- name: CreateDocument :one
-INSERT INTO documents (jobId) VALUES ($1) RETURNING id;
+INSERT INTO documents (jobId, hash, location) VALUES ($1, $2, $3) RETURNING id;