old_contents: 
  var exampleLevel1 = {
      size: 5,
      points: {
          "red": [
              [0, 0],
              [1, 4]
          ],
          "orange": [
              [4, 1],
              [3, 4]
          ]
      }
  };
  
  var exampleLevel2 = {
      size: 8,
      points: {
          "blue": [
              [4, 1],
              [3, 4]
          ]
      }
  };
  
  var exampleLevel3 = {
      size: 6,
      points: {
          "cyan": [
              [1, 1],
              [2, 3]
          ],
          "magenta": [
              [3, 2],
              [2, 3]
          ],
          "pink": [
              [4, 1],
              [3, 4]
          ]
      }
  };
  
  var exampleLevelSet1 = {
      name: 'Example Level Set',
      description: 'A set of levels to be played',
      levels: [
          exampleLevel1,
          exampleLevel2,
          exampleLevel3
      ]
  };
  
  var exampleLevelSet2 = {
      name: 'Another testing Level Set',
      description: 'Levels not just to be played, but enjoyed',
      levels: [
          exampleLevel3,
          exampleLevel2
      ]
  };
  
  var exampleLevelPack1 = {
      name: 'Example Level Pack',
      description: 'Impressive levels from the ends of the universe',
      sets: [
          exampleLevelSet1,
          exampleLevelSet2
      ]
  };
  
  var exampleLevelPack2 = {
      name: 'Another example Level Pack',
      description: 'An even more impressive set of levels from the ends of the universe',
      sets: [
          exampleLevelSet2
      ]
  };
  
new_contents: 
  var exampleLevel1 = {
      size: 5,
      points: {
          "red": [
              [0, 0],
              [1, 4]
          ],
          "orange": [
              [4, 1],
              [3, 4]
          ]
      }
  };
  
  var exampleLevel2 = {
      size: 8,
      points: {
          "blue": [
              [4, 1],
              [3, 4]
          ]
      }
  };
  
  var exampleLevel3 = {
      size: 6,
      points: {
          "cyan": [
              [1, 1],
              [2, 3]
          ],
          "magenta": [
              [3, 2],
              [2, 3]
          ],
          "pink": [
              [4, 1],
              [3, 4]
          ]
      }
  };
  
  var exampleLevelSet1 = {
      name: 'Example Level Set',
      description: 'A set of levels to be played',
      levels: [
          exampleLevel1,
          exampleLevel2,
          exampleLevel3
      ]
  };
  
  var exampleLevelSet2 = {
      name: 'Another testing Level Set',
      description: 'Levels not just to be played, but enjoyed',
      levels: [
          exampleLevel3,
          exampleLevel2
      ]
  };
  
  var exampleLevelPack1 = {
      name: 'Example Level Pack',
      description: 'Impressive levels from the ends of the universe',
      sets: [
          exampleLevelSet1,
          exampleLevelSet2
      ]
  };
  
  var exampleLevelPack2 = {
      name: 'Another example Level Pack',
      description: 'An even more impressive set of levels from the ends of the universe',
      sets: [
          exampleLevelSet2
      ]
  };
  
  var exampleLevelPacks1 = [
      exampleLevelPack1,
      exampleLevelPack2
  ];
  
  var exampleLevelPacks2 = [
      exampleLevelPack1,
      exampleLevelPack2,
      exampleLevelPack1,
      exampleLevelPack2
  ];
  
subject: Add fixture data for level manager