Merge pull request #210 from martinling/reorganise

Reorganise source code

src/backend/cynthion.rs

@@ -1,3 +1,5 @@
+//! USB capture backend for Cynthion.
+
 use std::cmp::Ordering;
 use std::collections::VecDeque;
 use std::time::Duration;

src/backend/ice40usbtrace.rs

@@ -1,3 +1,5 @@
+//! USB capture backend for iCE40-usbtrace.
+
 use std::collections::VecDeque;
 use std::sync::mpsc;
 use std::time::Duration;

src/backend/mod.rs

@@ -1,3 +1,5 @@
+//! The backend API for USB capture devices.
+
 use std::collections::BTreeMap;
 use std::sync::mpsc;
 use std::thread::{JoinHandle, spawn, sleep};

src/backend/transfer_queue.rs

@@ -1,3 +1,5 @@
+//! Helper type for managing a queue of USB bulk transfers.
+
 use std::sync::mpsc;
 
 use anyhow::{Context, Error};

src/build.rs

@@ -1,3 +1,5 @@
+//! Code to be executed at build time.
+
 fn main() {
     built::write_built_file().expect("Failed to acquire build-time information");
 }