Merged in feature/client (pull request #31)

Client Entity

* repolevel

* servicefunctions

* openapiclientget

* openapiupdate

* client

* vendor

database/queries/client.sql

@@ -0,0 +1,8 @@
+-- name: CreateClient :one
+INSERT INTO clients (name) VALUES ($1) RETURNING id;
+
+-- name: GetClient :one
+SELECT id, name, canSync FROM clients WHERE id = $1;
+
+-- name: UpdateClient :exec
+UPDATE clients SET name = $1, canSync = $2 WHERE id = $3;