[DRAFT] 195-namedqubits

[johanvos]

Instead of referring to qubits by their index, this PR allows to refer to qubits using their assigned name.

Fix #195

This allows to create applications like this:

import org.redfx.strange.*;
import org.redfx.strange.gate.*;
import org.redfx.strange.local.SimpleQuantumExecutionEnvironment;
import java.util.Arrays;

public class ShortStrangeDemo {
    public static void main(String[] args) {
        Qubit controlQubit = new Qubit();
        Qubit targetQubit = new Qubit();
        Program p = new Program(controlQubit, targetQubit);
        p.addSteps(new Step(new Hadamard(controlQubit)), new Step(new Cnot(controlQubit, targetQubit)));
        SimpleQuantumExecutionEnvironment sqee = new SimpleQuantumExecutionEnvironment();
        Qubit[] qubits = sqee.runProgram(p).getQubits();
        Arrays.asList(qubits).forEach(q -> System.out.println("qubit with probability on 1 = "+q.getProbability()+", measured it gives "+ q.measure()));
    }
}