3D BIN PACK
-------

Find out if a bin can contain the given packages.

Example usage:

    var ThreeDimensionBinPack = require('./index.js')();
    
    // Create a bin with dimensions h, w, d
    var bin = new ThreeDimensionBinPack.Bin(10, 9, 11);
    
    // Add your packages to the bin
    bin.addPackage(2,4,8);
    bin.addPackage(2,2,10);
    bin.addPackage(2,5,10);
    
    // Determine if the packages will fit into the bin
    bin.doesFit(function(packagesFitInsideBin){
        console.log('does it fit? '+packagesFitInsideBin);
    });