Restructure to library / binary combo

src/pool.rs

@@ -0,0 +1,28 @@
+use Result;
+use block::Block;
+use binread::{BinRead, BinReadable};
+
+#[derive(Debug)]
+pub struct Pool {
+    pub data: Vec<i32>
+}
+
+impl Pool {
+    pub fn new(mut block: Block) -> Result<Pool> {
+        let cap = block.len() / 4;
+        let mut vec = Vec::with_capacity(cap);
+        while block.has_i32() {
+            vec.push(block.read_i32()?);
+        }
+        Ok(Pool {
+            data: vec
+        })
+    }
+
+    pub fn get(&self, index: usize) -> Result<i32> {
+        if index >= self.data.len() {
+            return Err("No such constant")
+        }
+        Ok(self.data[index])
+    }
+}