Edition 2018 (#24)

* "cargo fix --edition" for the library

* Switch to 2018 edition

* Use cargo fix edition-idioms and remove the internal renaming from embedded_hal to hal

* Updated Readme

* run cargo fmt

src/epd4in2/command.rs

@@ -1,5 +1,5 @@
 //! SPI Commands for the Waveshare 4.2" E-Ink Display
-use traits;
+use crate::traits;
 /// EPD4IN2 commands
 ///
 /// Should rarely (never?) be needed directly.
@@ -165,7 +165,7 @@ impl traits::Command for Command {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use traits::Command as CommandTrait;
+    use crate::traits::Command as CommandTrait;
 
     #[test]
     fn command_addr() {

src/epd4in2/constants.rs

@@ -1,4 +1,4 @@
-use color::Color;
+use crate::color::Color;
 
 pub const WIDTH: u32 = 400;
 pub const HEIGHT: u32 = 300;

src/epd4in2/graphics.rs

@@ -1,4 +1,4 @@
-use epd4in2::constants::{DEFAULT_BACKGROUND_COLOR, HEIGHT, WIDTH};
+use crate::epd4in2::constants::{DEFAULT_BACKGROUND_COLOR, HEIGHT, WIDTH};
 
 /// Full size buffer for use with the 4in2 EPD
 ///
@@ -20,12 +20,12 @@ impl Default for Buffer4in2 {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use color::Color;
+    use crate::color::Color;
+    use crate::epd4in2;
+    use crate::graphics::{Display, DisplayRotation};
     use embedded_graphics::coord::Coord;
     use embedded_graphics::prelude::*;
     use embedded_graphics::primitives::Line;
-    use epd4in2;
-    use graphics::{Display, DisplayRotation};
 
     // test buffer length
     #[test]
@@ -40,7 +40,7 @@ mod tests {
     fn graphics_default() {
         let mut display4in2 = Buffer4in2::default();
         let display = Display::new(WIDTH, HEIGHT, &mut display4in2.buffer);
-        use epd4in2;
+        use crate::epd4in2;
         for &byte in display.buffer() {
             assert_eq!(
                 byte,

src/epd4in2/mod.rs

@@ -46,19 +46,19 @@
 //!
 //! BE CAREFUL! The screen can get ghosting/burn-ins through the Partial Fast Update Drawing.
 
-use hal::{
+use embedded_hal::{
     blocking::{delay::*, spi::Write},
     digital::*,
 };
 
-use interface::DisplayInterface;
-use traits::{InternalWiAdditions, RefreshLUT, WaveshareDisplay};
+use crate::interface::DisplayInterface;
+use crate::traits::{InternalWiAdditions, RefreshLUT, WaveshareDisplay};
 
 //The Lookup Tables for the Display
 mod constants;
 pub use self::constants::*;
 
-use color::Color;
+use crate::color::Color;
 
 pub(crate) mod command;
 use self::command::Command;