Dont allow edit Constraint2D in editor[ci skip]
Add More constraint type. [ci skip]
Add Lua and AngelScript binding.
Add new line at end of file.[ci skip]
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Bin/Data/LuaScripts/28_Urho2DPhysicsRope.lua
	Bin/Data/Scripts/28_Urho2DPhysicsRope.as
	Source/Engine/LuaScript/pkgs/Urho2D/ConstraintFriction2D.pkg
	Source/Engine/LuaScript/pkgs/Urho2D/ConstraintRevolute2D.pkg
	Source/Engine/LuaScript/pkgs/Urho2DLuaAPI.pkg
	Source/Samples/28_Urho2DPhysicsRope/Urho2DPhysicsRope.cpp