Test both dbs (#205)

* move scripts, allow testing both dbs with one cmd

* tidy + vendor

* update test.sh to ignore cache

* put test commands directly in drone.yml

* change CONTRIBUTING slightly

* go ham on the readme

scripts/generateswagger.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -eu
+
+SWAGGER_FILE="docs/api/swagger.yaml"
+GTS_VERSION="$(cat version)"
+
+swagger generate spec -o "${SWAGGER_FILE}" --scan-models
+sed -i "s/REPLACE_ME/${GTS_VERSION}/" "${SWAGGER_FILE}"