Publish mongoose src and tests

CL: Mongoose Web Server: Publish sources and tests

Resolves https://github.com/cesanta/mongoose/issues/745

PUBLISHED_FROM=7ecd7a3c518cfa614a6ba0838678dcb91b75a8c0

test/data/mg_init.js

@@ -0,0 +1,12 @@
+Http = {
+  onrcv: function(c, req) {
+    if (req.uri === '/data/js') {
+      // Send reply. We need to construct everything, headers and body
+      mg_send(c, 'HTTP/1.0 200 OK\r\n\r\n');
+      mg_send(c, JSON.stringify(req));
+
+      // Let Mongoose know we've handled the connection
+      return true;
+    }
+  }
+}