v2.5.5

• Allow IPC during plugin discovery (controlled by external tools)
• Expose a few extra APIs in carla-utils library
• Install extra carla-utils related headers during make install
• Fix invalid/empty LV2 paths for compatibility with lilv
• Fix LV2 plugin state for plugin bridges
• Fix showing engine device settings on systems without JACK
• Fix usage with LMMS on Windows
• Remove use of REAL_BUILD macro, no longer needed
• Tweaks for integration in OBS
• Other minor fixes and cleanup