update check for superlatives (in "# Rules")

[lpmi-13]

currently, the algorithm places stress on -est forms of ADJ and ADVB, though it will incorrectly place the stress on "most" in "most + ADJ" and "most + ADVB" constructions.

Add a rule that if the superlative tag is "most", place the stress on the word it modifies (in the simplistic model, just choose the next word that is either an adjective (POS Tag = JJ) or adverb (POS Tag = RB)