apple and regular favicons should also be optional

[owzim]

If one wants to have different input files for different platforms, it would be helpful to have every type of icon be optional, like options.firefox, options.coast and options.windowsTile

default:
options.apple = true;
options.regular = true;

I've already implemented that in my local copy, but a pull request would be overkill in this case, right?

[qasimalyas]

All icons should be optional in my opinion. In one of my projects I only need around five icons which deals with most browser / devices I need to support.

The ability to optionally select icons to create would be certainly welcomed.

[bensquire]

+1

[gleero]

Done