Renames SS14.* to Robust.* (#793)

RobustToolbox projects should be named Robust.* 

This PR changes the RobustToolbox projects from SS14.* to Robust.*

Updates SS14.* prefixes/namespaces to Robust.*
Updates SpaceStation14.sln to RobustToolbox.sln
Updates MSBUILD/SS14.* to MSBUILD/Robust.*
Updates CSProject and MSBuild references for the above
Updates git_helper.py
Removes Runserver and Runclient as they are unusable

Robust.Shared.Maths/Vector3d.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Robust.Shared.Maths
+{
+    [Serializable]
+    [StructLayout(LayoutKind.Sequential)]
+    public readonly struct Vector3d
+    {
+        public readonly double X;
+        public readonly double Y;
+        public readonly double Z;
+
+        public Vector3d(double x, double y, double z)
+        {
+            X = x;
+            Y = y;
+            Z = z;
+        }
+
+        public void Deconstruct(out double x, out double y, out double z)
+        {
+            x = X;
+            y = Y;
+            z = Z;
+        }
+
+        public static implicit operator Vector3d(Vector3 vector)
+        {
+            return new Vector3d(vector.X, vector.Y, vector.Z);
+        }
+    }
+}