Addition: Statistics methods to the Page Model

Adds Page->getTotalPageViews($date = null) &
Page->getPageStatistics($limit = 20) statistic methods to the Page
model, there is no way to 'legally' get this data for Pages at the
moment, where as the is for Files via the File->getDownloadStatistics()
& File->getTotalDownloads().
Addition: on_page_trash event dispatch

Probably pencilled in for 5.7.0 anyway.
dynamic sort by for page list
escape value in css inspector
added mysqlt datadict to adodb
Merge pull request #868 from Remo/escape-custom-css-styles

escape value in css inspector
Merge pull request #867 from Remo/5.7-sortby-call

dynamic sort by for page list
Merge pull request #791 from olsgreen/page-total-views

Addition: Statistics methods to the Page Model
Merge pull request #793 from olsgreen/on-page-trash

Addition: on_page_trash event dispatch
tweak event name