Introduce new Buffer and BufferSet classes

src/Buffer.ts

@@ -0,0 +1,23 @@
+/**
+ * @license MIT
+ */
+
+import { ITerminal } from './Interfaces';
+import { CircularList } from './utils/CircularList';
+
+export class Buffer {
+  private _lines: CircularList<any>;
+  private _ybase: number;
+  private _ydisp: number;
+  private _y: number;
+  private _x: number;
+  private _tabs: any;
+
+  constructor(private terminal: ITerminal) {
+    this._lines = new CircularList(this.terminal.scrollback);
+  }
+
+  public get lines(): CircularList {
+    return this._lines;
+  }
+}