Allow core package override by package handle string
Allow core package override by package handle string

MichaelMaar/concrete5,avdevs/concrete5,avdevs/concrete5,MichaelMaar/concrete5,avdevs/concrete5,matt9mg/concrete5,TimDix/concrete5,matt9mg/concrete5,TimDix/concrete5,matt9mg/concrete5,MichaelMaar/concrete5,TimDix/concrete5