updated readme

spec/README.md

@@ -14,13 +14,24 @@ To run one set of tests:
 npm test spec/basic.tests.spec.js
 ```
 
+By default the zip tests only run on manifest files which have changed.
+
 To force the zip tests to run for certain manifest files:
 ```
-TEST_MANIFEST_ZIPS=plugins/JW-Modules.json npm test
+TEST_MANIFEST_ZIPS=plugins/JW-Modules.json npm test spec/zip.tests.spec.js
 ```
 
+## Schema Validation
+
+Our schema is [here](./manifest.json)
+
+We use [ajv](https://github.com/epoberezkin/ajv) to validate manifests against that schema.
+
+
 ## Virus Total
 
+*Currently Disabled because they are slow and annoying*
+
 **Rate Limit: 4 per minute**
 
 `VT_API_KEY` env var is required and already set in travisci settings