Fix some API docs
Add HTML representation and pagination support for selected features route. With support added to this route, we get a virtual property palette for free with any map viewer (yay!)

Also tweak the HTML representation:
 - Show page number

Fixes #76
Fixes #75
HTML representation improvements:
 - Show feature total and max pages if paginated reader has an explicit total passed in
 - Pass in MgSelection::GetSelectedFeaturesCount() to paginated reader for selected features route, this allows for total features and max pages to be shown in its HTML representation