Weekly Quizzes creation and json api exposure

## Basics

* Similar but not the same as the M&L quiz (which is more like a survey).
* Needs a weekly quiz model
* Each quiz will have 3 questions with 3 options (each with a related response)
* Total quiz question and answers should not exceed 160 characters (this should be validated in admin UI - server side) per question
* Total quiz related response to each question answer should not exceed 160 characters
* Old quizzes will just be ignored, the api should return just the newest "published" quiz

There need to be just one endpoint

**GET /api/weeklyquiz/**

Returns this weeks quiz:

    {
        "quiz": {
            "start": "q_1",
            "quiz_details": {
                "answers": {
                    "q_1_a_1": {
                        "response": "Yes -  Genius",
                        "next": "q_2"
                    },
                    "q_1_a_2": {
                        "response": "No - Dur",
                        "next": "q_2"
                    },
                    "q_1_a_3": {
                        "response": "No - Dur",
                        "next": "q_2"
                    },
                    "q_2_a_1": {
                        "response": "No - Dur",
                        "next": "q_3"
                    },
                    "q_2_a_2": {
                        "response": "Yes -  Genius",
                        "next": "q_3"
                    },
                    "q_2_a_3": {
                        "response": "No - Dur",
                        "next": "q_3"
                    },
                    "q_3_a_1": {
                        "response": "No - Dur",
                        "next": "main_menu"
                    },
                    "q_3_a_2": {
                        "response": "No - Dur",
                        "next": "main_menu"
                    },
                    "q_3_a_3": {
                        "response": "Yes - Genius",
                        "next": "main_menu"
                    }
                },
                "questions": {
                    "q_1": {
                        "question": "Am I fake question 1?",
                        "choices": [
                            [
                                "q_1_a_1",
                                "Yes!"
                            ],
                            [
                                "q_1_a_2",
                                "No!"
                            ],
                            [
                                "q_1_a_3",
                                "Maybe!"
                            ]
                        ]
                    },
                    "q_2": {
                        "question": "Am I fake question 2?",
                        "choices": [
                            [
                                "q_2_a_1",
                                "Yes!"
                            ],
                            [
                                "q_2_a_2",
                                "No!"
                            ],
                            [
                                "q_2_a_3",
                                "Maybe!"
                            ]
                        ]
                    },
                    "q_3": {
                        "question": "Am I fake question 3?",
                        "choices": [
                            [
                                "q_3_a_1",
                                "Yes!"
                            ],
                            [
                                "q_3_a_2",
                                "No!"
                            ],
                            [
                                "q_3_a_3",
                                "Maybe!"
                            ]
                        ]
                    }
                }
            }
        }
    }

If there is no quiz should just respond:

    {"quiz": false}