v1.00-rc3

This is another RC version of the engine.

Changes introduced:

• Ignore client requested snaps, enforce a value based on sv_fps
• (Re)introduce Legacy ABI
• (Re)introduce QVM functionalities
• Add CMake support to build the engine, drop Makefile
• Fix issues with Raven's masterserver not displaying the server when the packet gets fragmented due to size.
• Introduce SoF2 1.00 / Silver / protocol 2002 support
• Introduce Multiprotocol from Silver to Gold (so far the game module had to be Gold and multiprotocol was only working from Gold to Silver)
• Move availableeapons, drop and outfitting spoofing to Engine so it wouldn't be dependent on the engine.