Document map options more thoroughly
Make ol.format.KML#readName method exportable
Make ol.tilegrid.TileGrid#getResolutions method exportable
Merge pull request #2218 from oterral/exports

Add exports
Add ol.Feature#clone
Merge pull request #2138 from probins/mapoptions

Document map options more thoroughly
Merge pull request #2242 from elemoine/feature-clone

Add ol.Feature#clone