Fixed some @params documentation (includes/[Article|Pref|Skin].php)

Swapped some "$var type" to "type $var" or added missing types
before the $var. Changed some other types to match the more common
spelling. Makes beginning of some text in captial.

Change-Id: I6627ba0e76d3577c40bf2473e0f78a5ad7368634
Merge "Fixed some @params documentation (includes/[Article|Pref|Skin].php)"