core: Added EVM configuration options

The EVM is now initialised with an additional configured object that
allows you to turn on debugging options.

core/vm/vm_jit_fake.go

@@ -22,5 +22,5 @@ import "fmt"
 
 func NewJitVm(env Environment) VirtualMachine {
 	fmt.Printf("Warning! EVM JIT not enabled.\n")
-	return EVM(env)
+	return New(env, nil)
 }