Fixed some things, enable parsing from anything that impl Read

src/programs/viewer.rs

@@ -20,7 +20,7 @@ use glium::glutin::VirtualKeyCode;
 use model_converter::scene::Scene;
 use model_converter::math::bounding_box::BoundingBox3;
 use model_converter::math::vector::Vector3;
-use model_converter::parser::parse;
+use model_converter::parser::parse_file;
 use model_converter::renderer::Renderer;
 use model_converter::controls::{OrbitControls, FirstPersonControls};
 use model_converter::camera::Camera;
@@ -65,7 +65,7 @@ fn main() {
     let mut models = vec![];
 
     for input in matches.values_of("input").unwrap() {
-        match parse(&input) {
+        match parse_file(&input) {
             Ok(model) => {
                 if model.vertices.len() > 0 {
                     bbox = bbox.union(&model.bounding_box());