Add a MergeDAO which applies a pluggable merge strategy when writing an object to the DAO when it already exists there.
Add a MergeDAO which applies a pluggable merge strategy when writing an object to the DAO when it already exists there.

mdittmer/foam,osric-the-knight/foam,foam-framework/foam,mdittmer/foam,osric-the-knight/foam,jlhughes/foam,mdittmer/foam,foam-framework/foam,jlhughes/foam,osric-the-knight/foam,jacksonic/foam,foam-framework/foam,mdittmer/foam,jlhughes/foam,osric-the-knight/foam,jacksonic/foam,foam-framework/foam,foam-framework/foam,jlhughes/foam,jacksonic/foam,jacksonic/foam