Slow Rabin-Karp and Knuth-Morris-Pratt for large files

[jaspersone]

Something is wrong with the search performance time of the RK and KMP match algorithms on large files. They perform worse than brute force does on sampleOutput.txt.

[utexas-coder]

We need to split the RKMatch function into two methods, so the inner loop of the rolling hash will be tighter.