Reimplement static properties by extending PyProperty_Type
Instead of creating a new unique metaclass for each type, the builtin
`property` type is subclassed to support static properties. The new
setter/getters always pass types instead of instances in their `self`
argument. A metaclass is still required to support this behavior, but
it doesn't store any data anymore, so a new one doesn't need to be
created for each class. There is now only one common metaclass which
is shared by all pybind11 types.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 63f3483..4305cee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -56,6 +56,7 @@
include/pybind11/attr.h
include/pybind11/cast.h
include/pybind11/chrono.h
+ include/pybind11/class_support.h
include/pybind11/common.h
include/pybind11/complex.h
include/pybind11/descr.h