"wtkappa" is confusing to some users

[bwriordan]

In the rsmeval output, under association statistics, there is “wtkappa” output. I just realized this is confusing for some users who are scanning for “QWK”, the standard abbreviation. Also there is both “wtkappa” and “kappa” and some users assume that “kappa” is actually QWK (because users typically use "kappa" for QWK as a shorthand). Recoding “wtkappa” to "QWK" would be a good first step to making the results more quickly interpretable, especially for users who are consuming the reports who are not advanced users.