Seg Reader

Added the ability to read Seg lumps from the WAD file.

src/lumps/seg.rs

@@ -0,0 +1,19 @@
+use crate::types::Seg;
+
+pub struct SegLump {
+    pub segs: Vec<Seg>,
+}
+
+impl SegLump {
+    pub fn get_num_segs(&self) -> usize {
+        self.segs.len()
+    }
+
+    pub fn get_all_segs(&self) -> Vec<Seg> {
+        self.segs.to_vec()
+    }
+
+    pub fn get_seg(&self, pos: usize) -> Seg {
+        self.segs[pos].to_owned()
+    }
+}