Easier to read setup code

[MattesGroeger]

We could simplify creation by using macros and convenience methods:

id group1 = sequentialGroup();
id group2 = sequentialAutoStartGroup();
id group3 = concurrentGroup();
id group4 = concurrentAutoStartGroup();

[group1 addCommand:[[DelayCommand alloc] initWithDelayInSeconds:1]];
[group1 addCommand:group3];
[group1 addBlockCommand:^(CommandCallback complete)
{
    NSLog(@"block command executed");
    complete();
}];