Changes in api and upwards

- Removed out-of-stack error reporting
- Revised module system to match previous Orchid system
- Errors are now in a Vec everywhere
- Implemented atoms and lexer
- Started implementation of line parser
- Tree is now ephemeral to avoid copying Atoms held inside
- Moved numbers into std and the shared parser into base
- Started implementation of Commands

orchid-host/src/lib.rs

@@ -4,3 +4,4 @@ pub mod extension;
 pub mod lex;
 pub mod results;
 pub mod tree;
+pub mod parse;