Replace sources/build with top-level ./build script

build

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+cd sources
+npm install
+
+if [ "$1" == "all" ]; then
+    npm run all
+else
+    npm run build
+fi

sources/build

@@ -1,4 +0,0 @@
-#!/bin/bash
-
-cd sources
-npm run build

sources/build-and-test

@@ -1,4 +0,0 @@
-#!/bin/bash
-
-cd sources
-npm run all