Add support for WMS and aggregate layers
Temporary workaround for the 204 no content issue
Temporary workaround for the min/maxResolution mismatch
Add ratio: 1 when creating wms sources
Be safer when removing query params

Only remove getCapavilities query params that would be overriden in getMap
queries instead of removing the entire query string
Support min and mx res correctly
Add suppot for tiled WMS and serverLayerName
Fix comment
Merge pull request #497 from geoadmin/dev_aggregate_layers

WORK IN PROGRESS: Add support for WMS and aggregate layers