modified:   operator.py - implemented some operators with many warnings because things will   change shortly   - FeatChangeOperator   - AddArbitraryStringOperator   - CreateBinaryOperator
modified:   operator.py
- implemented some operators with many warnings because things will
  change shortly
  - FeatChangeOperator
  - AddArbitraryStringOperator
  - CreateBinaryOperator

kornai/pymachine,kornai/pymachine,recski/pymachine,Eszti/pymachine,Eszti/pymachine,recski/pymachine