GLTFLoader: Expand getDependency()

[takahirox]

var fnName = 'load' + type.charAt( 0 ).toUpperCase() + type.slice( 1 );
dependency = this[ fnName ]( index );

This style is a bit hard to read through the code especially for new devs because of statically unknown function reference, actually seems like some IDEs can't follow the reference (A tweet in Japanese)

So I think it'd better to expand tho lines# will increase

switch( type ) {

    case 'scene':
        dependency = this.loadScene( index );
        break;

    ....

}

Let me know if you have any better ideas.

[mrdoob]

Much nicer!

[mrdoob]

Thanks!