Initial verison of PrettyPrinter builder

examples/simple.rs

@@ -1,22 +1,12 @@
 /// A simple program that prints its own source code using the bat library
-use bat::{
-    config::{Config, InputFile, OrdinaryFile},
-    Controller, HighlightingAssets,
-};
+use bat::PrettyPrinter;
 use std::ffi::OsStr;
 
 fn main() {
     let path_to_this_file = OsStr::new(file!());
 
-    let config = Config {
-        files: vec![InputFile::Ordinary(OrdinaryFile::from_path(
-            path_to_this_file,
-        ))],
-        colored_output: true,
-        true_color: true,
-        ..Default::default()
-    };
-    let assets = HighlightingAssets::from_binary();
-
-    Controller::new(&config, &assets).run().expect("no errors");
+    PrettyPrinter::new()
+        .file(path_to_this_file)
+        .run()
+        .expect("no errors");
 }