PopVars extra columns

[erinlandguth]

cdinfect and transmissionrate no longer used. Usermanual still pointing to.

[cday41]

Just noticed this as well. It was left over in a bunch of example files, along with a leftover egg frequency parameter and a mature_length_set parameter.

I committed a new set of input files, but I don't see these variables mentioned in the user manual now. Did you fix it @erinlandguth