Added human-like_finder.pl -- a smart human-like substring finder algorithm.

Steps:
  1. loop from i=2 and count up to int(sqrt(len(text)))
  2. loop from pos=(i-2)*len(substr)*2 and add int(len(text)/i) to pos while pos <= len(text)
  3. jump to position pos and scan back and forward and stop if the string is found somewhere nearby
  4. loop #2 end
  5. loop #1 end
  6. return -1