Keyword search using pattern matching algorithms

Comparing running time of naive pattern-matching, Knuth-Morris-Pratt pattern matching, and Rabin-Karp pattern matching algorithms using Python and Java.

Both packages takes a keyword "keyword" and a directory "dir" containing source files to search as command-line arguments.

For Python:

$python find-string.py -k keyword -s dir

For Java:

$javac java_source/FindString.java
$java java_source.FindString keyword dir

Note - The snowball package for Java is required to run the Java source, available at snowball.tartarus.org

TODO

Fix bugs in accepting single source file rather than directory as argument.