message: readme: Clarify which "determinism" features are supported
diff: @@ -29,8 +29,8 @@ III) Conformance
  IV) First class support for determistic applications (*blockchain*)
  - [ ] Support canonical handling of floating point (i.e. NaNs stricter than in the spec)
  - [ ] Support an efficient big integer API (256-bit and perhaps 384-bit)
  -- [ ] Support optional runtime metering in the interpreter
  -- [ ] Support enforcing a call depth bound
  +- [x] Support optional runtime metering in the interpreter
  +- [x] Support enforcing a call depth bound
  - [ ] Further restrictions of complexity (e.g. number of locals, number of function parameters, number of labels, etc.)
  ## Building and using
  