Added add-kmulligan.txt as part of tutorial.
Added add-kmulligan.txt as part of tutorial.

SarahSexton/patchwork,colpac64/patchwork,rkaranam/patchwork,cadazab/patchwork,juliozm20/patchwork,carufenon/patchwork,Frankyx93/patchwork,joysjsj/patchwork