fix (plugins) fixing which page variable is being used

JavaScript programming is hard... I thought the reference between
the different objects would be the same in my previous fix, but I
was wrong. This fixes that by only using the `context.page.page`
variable since that's what's being passed into the plugins and
what could potentially be modified.
Merge pull request #400 from doowb/master

fix (plugins) fixing which page variable is being used