Throw an exception if an ol.structs.RBush is modified while reading
Only activate ol.structs.RBush conflict checks when goog.DEBUG is true
Rename ol.structs.RBush#all to getAll
Rename ol.structs.RBush#allInExtent to getAllInExtent
Fix infinite loop bug in ol.structs.RBush
Update ol.interaction.Modify to use ol.structs.RTree#getAllInExtent
Merge pull request #1324 from twpayne/rbush-improvements

RBush improvements