remove extern crate declaration and fix outfall (macros now need to be imported into scope)

using use declarations in main.rs so that use paths don't need to be updated as well, this will be done in a later commit

build.rs

@@ -15,15 +15,13 @@ fn find_prolog_files(libraries: &mut File, prefix: &str, current_dir: &Path) {
     for entry in entries.filter_map(Result::ok).map(|e| e.path()) {
         if entry.is_dir() {
             if let Some(file_name) = entry.file_name() {
-                let new_prefix =
-                    prefix.to_owned() + file_name.to_str().unwrap() + "/";
+                let new_prefix = prefix.to_owned() + file_name.to_str().unwrap() + "/";
                 find_prolog_files(libraries, &new_prefix, &entry);
             }
         } else if entry.is_file() {
             let ext = std::ffi::OsStr::new("pl");
             if entry.extension() == Some(ext) {
-                let contain =
-                    String::from_utf8(fs::read(&entry).unwrap()).unwrap();
+                let contain = String::from_utf8(fs::read(&entry).unwrap()).unwrap();
                 let name = entry.file_stem().unwrap().to_str().unwrap();
 
                 let line = format!(
@@ -47,7 +45,7 @@ fn main() {
 
     libraries
         .write_all(
-            b"ref_thread_local! {
+            b"ref_thread_local::ref_thread_local! {
     pub static managed LIBRARIES: IndexMap<&'static str, &'static str> = {
         let mut m = IndexMap::new();\n",
         )