Added a few comments to enhance understanding

ProjectEuler/Problem7.m

@@ -5,6 +5,8 @@
 %Setup the variables
 counter = 1000;
 primeList = [];
+
+%Cycle through the prime numbers until you get the correct number
 while(size(primeList)(2) < 10001)
 	primeList = primes(counter);
 	counter += 1000;