Reorder/optimize use calls

src/main.rs

 use std::time::Duration;
+use std::env::var;
 
-extern crate spaceapi_server;
 #[macro_use] extern crate log;
 extern crate env_logger;
+
+extern crate spaceapi_server;
 extern crate r2d2_redis;
 
 use spaceapi_server::SpaceapiServerBuilder;
@@ -10,14 +12,10 @@ use spaceapi_server::api;
 use spaceapi_server::api::Keymaster;
 use spaceapi_server::modifiers::StatusModifier;
 
-use std::env::var;
-
 use r2d2;
-use r2d2_redis::RedisConnectionManager;
-use redis;
 use redis::{Commands, RedisResult};
 
-type RedisPool = r2d2::Pool<RedisConnectionManager>;
+type RedisPool = r2d2::Pool<r2d2_redis::RedisConnectionManager>;
 
 struct OpenStatusFromRedisModifier {
     pool: RedisPool
@@ -111,7 +109,7 @@ fn main() {
         .expect("Creating status failed");
 
     let redis_connstring = var("REDIS_CONNSTRING").unwrap_or(String::from("redis://localhost"));
-    let manager = RedisConnectionManager::new(&*redis_connstring).unwrap();
+    let manager = r2d2_redis::RedisConnectionManager::new(&*redis_connstring).unwrap();
     let pool = RedisPool::builder()
         .connection_timeout(Duration::from_secs(1))
         .build(manager)