implemented 'slice' and 'split' for sequences.
implemented 'slice' and 'split' for sequences.

mario-campos/clay,aep/clay,aep/clay,iamrekcah/clay,jckarter/clay,jckarter/clay,aep/clay,mario-campos/clay,jckarter/clay,iamrekcah/clay,mario-campos/clay,aep/clay,mario-campos/clay,aep/clay,jckarter/clay,iamrekcah/clay,jckarter/clay,iamrekcah/clay,mario-campos/clay,iamrekcah/clay,jckarter/clay,aep/clay