Specifying args

Any preference on how args should be specified?

If I wanted to call these functions:
```
main(0xabcd)
sum(1, 2)
finish()
```

How about this:
```
primea --create test.wasm main 0xabcd sum 1,2 finish
```

Or this:
```
primea --create test.wasm --run main,sum,finish --main arg0 --sum 1,2
```