FeatStd Memory Management
Removed Sharing Object
The outdated and orphaned file SharingObject.h has been removed.
Retain Count atomic and uncopyable
The retain count of shared objects - enabled by macro "FEATSTD_SHARED_POINTER_DECLARATION" - has been made atomic to make increments and decrements thread-safe. Additionally the retain count has been made uncopyable to avoid copying the retain count when cloning shared objects.