Corrected the repeatability tutorial.
Corrected the repeatability tutorial.

vlfeat/vlbenchmarks,andersbll/vlbenchmarks,CVML/vlbenchmarks,andersbll/vlbenchmarks,CVML/vlbenchmarks,vlfeat/vlbenchmarks,CVML/vlbenchmarks,vlfeat/vlbenchmarks,andersbll/vlbenchmarks,andersbll/vlbenchmarks