##### TODO list:
----------------

- [x] **VM execution:** support CALL op   
- [ ] **VM execution:** support CREATE op
- [ ] **Build:** extract core module and studio application
- [ ] **Performance:** BigInteger math change for constant arrays implementation   
economy for memory allocation
- [ ] **Command Line:** add the headless run option   
- [ ] **Testing by JSON files:** follow cpp client performs test case by getting json file contains the test describe
- [ ] Serpent new syntax:   
(@> @< @/ @%) - unsigned operations   
 > < / % - default are all signed operations   
+= -= *= /= %= @/= @%= - short form operations      
share - code section
    


##### UnitTest:   
----------------

- [ ] **VM** complex testing for calls
- [ ] **WorldManager** apply transactions