Merge pull request #321 from matrix-org/rav/fix_eventschema_readme

Update eventschema readme

event-schemas/README.md

@@ -1,13 +1,6 @@
-Testing a schema
+Checking the event schemas
-----------------
+==========================
-There are [many](http://json-schema.org/implementations.html) JSON Schema
+
-validators you can use to validate incoming events. Not all of them support
+To validate the event schemas, and check the example events, run
-JSON Schema v4, and some of them have bugs which prevent ``$ref`` from being
+
-resolved correctly. For basic CLI testing, we recommend and have verified they
+   ./check-examples.py
-work with the Node.js package [z-schema](https://github.com/zaggino/z-schema):
-```
- $ npm install -g z-schema
- $ z-schema schema/m.room.message examples/m.room.message_m.text
- schema validation passed
- json #1 validation passed
-```