Support of multiple output devices (monitor walls, CAVEs)

Added AppWall template application that supports output to multiple devices. It can be used to create multi-monitor walls, deeply immersive VR simulators and multi-dimensional CAVE systems. Each output device can has its own camera setup.

To control the number of monitors, include and customize data/core/scripts/wall.h script (check Wall settings that it adds into the main menu).

Render:

• Added multi-viewport output for all supported graphical APIs.
• Added screen-space reflection post-process (post_filter_reflection base material).
• Fixed WorldCluster rendering bug.
• Fixed portal bounds detection bug.
• Support of asymmetric projections throughout the whole rendering pipeline.

UnigineScript:

• A lot of performance optimizations.
• System and editor scripts now have render() function.
• Fixed the crash on detecting parent class of the exported classes.
• Fixed occasional crashes by script shutdown.

Physics:

• Increased performance.
• Fixed stack overflow in 64-bit builds.
• Contact solver now utilizes SSE instruction set, if available.
• Fixed gravity flag saving bug for bodies.

Mobile version:

• Added telnet protocol support (default TCP port is 8888) to remotely control the application running on a target device (it provides full access to Unigine built-in console). Use "logout" command to close the session.
• More NEON optimizations for rendering.
• Contact solver now utilizes NEON instruction set, if available.
• Performance analyzer for Android and iOS.
• Thread-safe file access to "assets" directory on Android.
• Added "Crypt" and "Passage" demos to iOS and Android SDKs.
• Added Android Application Development article in the reference manual.

PlayStation 3 version:

• SPU optimization of collision detection and rigid body physics.
• Added Render memory counter into the profiler.
• Improved memory management.
• Added new PS3MeshRaw object. It stores vertices and indexes in the video memory and doesn't cull triangles (higher memory consumption but lower PPU load).
• Render utilizes up to 4 SPUs (1 SPU is always reserved for physics).

Other:

• Added sound samples memory profiling.
• Fixed non-blocking network sockets bug in Windows.
• Added "Tools -> Always update" option in UnigineEditor for focus-independent update of the application window.
• Added a new option that allows to fast save the selected material/property libraries in UnigineEditor.
• HAS_TABLET define is renamed to HAS_APP_TABLET.
• Added Gui::HIDE callback for GUI widgets.
• Added new UnigineRender class into C++ API for direct access to engine rendering functions.