Cleaning up main; Added window module

Adds a wrapper for the glutin::Window which provides strongly typed
APIs and more convenient interfaces. Moves some gl calls into the
opengl-based renderer.

The point of most of the changes here is to clean up main().

1 files changed, 9 insertions, 0 deletions

diff --git a/src/macros.rs b/src/macros.rs
index eb37d4db..740e5ed9 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -48,3 +48,12 @@ macro_rules! debug_print {
     }
 }
 
+#[macro_export]
+macro_rules! maybe {
+    ($option:expr) => {
+        match $option {
+            Some(value) => value,
+            None => return None,
+        }
+    }
+}