Copy marker options for marker layer
Add documentation for marker title
Add API reference for marker layer locationField and titleField
Customize marker layer samples
Update field defaults
Add default shape layer opacity
Add layerDefaults for marker layer
Update generated PHP API docs
Add top-level layerDefaults.marker object
Revert "Update generated PHP API docs"

This reverts commit 93cfd2db81adc130ea400457c599875f8e3f8697.
Update generated PHP API docs
Update generated JSP API docs
Update generated PHP docs
Update tooltip defaults
Update generated JSP API reference
Merge branch 'map-markers'