Add remaining 2d/3d drawing primitives (#98)

Author: tychedelia

Cargo.toml

@@ -128,6 +128,22 @@ path = "examples/custom_material.rs"
 name = "input"
 path = "examples/input.rs"
 
+[[example]]
+name = "primitives_2d"
+path = "examples/primitives_2d.rs"
+
+[[example]]
+name = "primitives_3d"
+path = "examples/primitives_3d.rs"
+
+[[example]]
+name = "curves"
+path = "examples/curves.rs"
+
+[[example]]
+name = "shapes"
+path = "examples/shapes.rs"
+
 [[example]]
 name = "blend_modes"
 path = "examples/blend_modes.rs"