Preparation for sharing

- rustfmt
- clippy
- comments
- README

src/pipeline/mod.rs

@@ -1,19 +1,14 @@
 pub mod error;
+pub mod file_loader;
+mod import_abs_path;
+mod import_resolution;
+mod parse_layer;
 mod project_tree;
 mod source_loader;
-mod import_abs_path;
 mod split_name;
-mod import_resolution;
-pub mod file_loader;
-mod parse_layer;
 
 pub use parse_layer::parse_layer;
 pub use project_tree::{
-  ConstTree, ProjectExt, ProjectModule, ProjectTree, from_const_tree,
-  collect_consts, collect_rules,
+  collect_consts, collect_rules, from_const_tree, ConstTree, ProjectExt,
+  ProjectModule, ProjectTree,
 };
-// pub use file_loader::{Loaded, FileLoadingError, IOResult};
-// pub use error::{
-//   ErrorPosition, ModuleNotFound, NotExported, ParseErrorWithPath,
-//   ProjectError, TooManySupers, UnexpectedDirectory
-// };