Aesthetic Inconsistency in Meaning of w Between Exclusivity Calculations

[bstewart]

Pointed out by Francisco Santamarina---line 101 of calcfrex() and exclusivity() use w in opposite ways (one as the weight on exclusivity, one as the weight on frequency). These are separate functions so won't cause any conflicts with each other, but obviously it isn't aesthetically great and definitely no issues if people use weights of .5.