Added Raymath binding + Initial examples

- Added Raymath.cs binding. Raylib.cs depends on this since they both share some types.
- Bindings moved into source directly.
- Inital examples port alot of syntax still needs to be fixed.
- Couldn't get cppsharp to work correctly so using a custom generator(WIP).

ExampleApplication/DrawControl.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Drawing;
+using System.Runtime.InteropServices;
+using System.Windows.Forms;
+using static Raylib.rl;
+
+namespace Raylib
+{
+    class DrawControl : Form
+    {
+        private Panel panel;
+
+        [DllImport("user32.dll")]
+        private static extern IntPtr SetParent(IntPtr child, IntPtr newParent);
+        [DllImport("user32.dll")]
+        private static extern IntPtr ShowWindow(IntPtr handle, int command);
+
+        public static void Run()
+        {
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            Application.Run(new DrawControl());
+        }
+
+        public DrawControl()
+        {
+            panel = new Panel();
+            panel.Size = new Size(640, 480);
+            panel.Location = new Point(80, 10);
+            panel.BackColor = System.Drawing.Color.Red;
+            Controls.Add(panel);
+        }
+
+        private void InitializeComponent()
+        {
+            this.SuspendLayout();
+            // 
+            // DrawControl
+            // 
+            this.ClientSize = new System.Drawing.Size(284, 261);
+            this.Name = "DrawControl";
+            this.Load += new System.EventHandler(this.DrawControl_Load);
+            this.ResumeLayout(false);
+
+        }
+
+        private void DrawControl_Load(object sender, EventArgs e)
+        {
+
+        }
+    }
+}