0.2.2: add more tokens, better node error messages

- Node deserialization errors use the new WaError::Context enum
  to give a better idea of where the error occured, whilst still
  preserving the orignal error information.
- The big list of tokens(tm) was updated.
- We now have a fun test for something we couldn't deserialize
  before, because it had a token on the big list(tm).
- The examples have been temporarily disabled, because they need
  fixing to work with code changes and I want to run tests in CI.