OTHER: Make xmmsv_coll_t a part of xmmsv_t like list and dict.
OTHER: s/xmmsv_coll_new/xmmsv_new_coll/g
OTHER: s/xmmsv_coll_new/xmmsv_new_coll/ in perl bindings.
OTHER: Add collection dag integrity tests.
OTHER: Add xmmsv_coll_is_type.
OTHER: Fix leak of coll operands in xmmsv_copy.
OTHER: Add more suppressions for valgrind-devel.
REMOVE ME: nerf deprecation warnings
OTHER: Use xmmsv_(de)serialize to save/load collections.