master slave implementation for corpus as one text - chunks corpus based on RK paper
master/slave for corpus with multiple texts (already hashed) - chunk of work = a 20-word line.
updated punctuation removal
added punctuation removal before hashing the word
Merge remote-tracking branch 'upstream/master'
	new file:   hashedfilenames.txt
Merge remote-tracking branch 'upstream/master'
source description
adding usage