Removed sample.labels from celda_G() signature. Ends #26.
Removed sample.labels from celda_G() signature. Ends #26.

I had added sample.labels into the celda_G() signature in order
to get it to stop complaining when celda() passed the unused argument,
but fixed the relevant issue in the previous commit.

compbiomed/celda,compbiomed/celda,compbiomed/celda