now creating QuadBatch's AGAL programs lazily on first usage (closes #466)

This drastically improves startup-time. Typically, only very few of the programs are required, anyway. Thanks to ajwfrost for making me aware of this!
now creating QuadBatch's AGAL programs lazily on first usage (closes #466)

This drastically improves startup-time. Typically, only very few of the programs are required, anyway. Thanks to ajwfrost for making me aware of this!