Don't append .index to core name autmatically

The array of string passed to load() is now full file names instead of
Core / dataset names.

src/database/mod.rs

@@ -138,9 +138,7 @@ impl DataBase {
     }
 
     pub fn load_core(name: &str) -> Result<(Vec<Space>, Core), String> {
-        let fn_index = format!("{}.index", name);
-
-        let mmap = DataBase::mmap_file(&fn_index)?;
+        let mmap = DataBase::mmap_file(&name)?;
 
         match bincode::deserialize(&mmap[..]) {
             Err(e) => Err(format!("Index deserialization error: {:?}", e)),

src/main.rs

@@ -29,7 +29,7 @@ fn main() {
     let db;
     {
         info_time!("Loading database index");
-        db = DataBase::load(&["10k"]).unwrap();
+        db = DataBase::load(&["10k.index"]).unwrap();
     }
 
     if true {