Add node modules and compiled JavaScript from main (#172)

Co-authored-by: Oliver King <oking3@uncc.edu>

node_modules/lines-and-columns/README.md

@@ -0,0 +1,29 @@
+# lines-and-columns
+
+Maps lines and columns to character offsets and back. This is useful for parsers
+and other text processors that deal in character ranges but process text with
+meaningful lines and columns.
+
+## Install
+
+```
+$ npm install [--save] lines-and-columns
+```
+
+## Usage
+
+```js
+import LinesAndColumns from 'lines-and-columns';
+
+const lines = new LinesAndColumns(
+`table {
+  border: 0
+}`);
+
+lines.locationForIndex(9);                       // { line: 1, column: 1 }
+lines.indexForLocation({ line: 1, column: 2 });  // 10
+```
+
+## License
+
+MIT