Add support for Carmenta Server hi-DPI WMS requests
Add ol.format.OSMXML and ol.source.OSMXML
Merge pull request #1794 from fredj/osmxml-format

Add ol.format.OSMXML and ol.source.OSMXML
Merge pull request #1782 from twpayne/caramenter-hidpi

Add support for Carmenta Server hi-DPI WMS requests