network: Don't shut down on ECONNRESET="Connection reset by peer" when receiving data
doc: Switch to Urho3D!
CMakeLists.txt: Initial Urho3D things
Builds now; doesn't run yet due to stuff in Lua expecting Polycode
client: Remove config.polycode_path
Client is now able to start and run code sent by server
testmodules/test1: Shows a 3D scene controllable by user input; add and fix other things to support it
Move client/urho3d.lua to extensions/urho3d
Wrap global variables created by sandbox so that they don't pollute the actual global sandbox table
client_api.txt
testmodules/test1: Use h3d namespace
Remove unused extensions: graphics joyinput keyinput mouseinput polycode_sandbox ui
interface/fs: get_cwd(), get_absolute_path()
client: Loading resources received from server works
testmodules/test1: Disable mouse control, use test1/green_texture.png for floor
client: urho3d_path