ofxDisplayStackObject 1.0.0

First semantic release of ofxDisplayStackObject.

• Modernizes the example window setup and Makefile build.
• Replaces addon-owned fixed-function matrix/color calls with openFrameworks drawing helpers.
• Fixes standard-library namespace issues for current C++ builds.
• Refreshes the README with usage and compatibility notes.

Verified with make Debug using openFrameworks 0.12.1 on macOS.