This release introduces Smart Handles. Smart Handles know their corresponding mesh and can be used to simplify access to navigation methods ( e.g. mesh->next_halfedge_handle(HH) can be written as handle.next()). You can find further details in the smart handles section under tutorials in the Documentation.
There are also new convenience functions to simplify calculations (e.g. summing up all neighbors,...)
Double support in OM and PLY Reader/Writer has been improved.
Some bugs were also fixed in this release along with improvements to the build system.