No longer require unsafe option

- Change unsafe/fixed to use IntPtr or MarshallAs instead.
- Added methods in physac to marshall IntPtr returns to PhysicsBodyData.

Bindings/Bindings.csproj

@@ -36,7 +36,7 @@
     <DebugSymbols>true</DebugSymbols>
     <OutputPath>bin\Debug\</OutputPath>
     <DefineConstants>DEBUG;TRACE</DefineConstants>
-    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <AllowUnsafeBlocks>false</AllowUnsafeBlocks>
     <DebugType>full</DebugType>
     <PlatformTarget>x64</PlatformTarget>
     <ErrorReport>prompt</ErrorReport>
@@ -84,8 +84,6 @@
     <Reference Include="System.Windows.Forms" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="core_basic_window.cs" />
-    <Compile Include="Program.cs" />
     <Compile Include="RayForm.cs">
       <SubType>Form</SubType>
     </Compile>