Update readme.

Author: kovacsv

README.md

@@ -93,19 +93,19 @@ const assimpjs = require ('./assimpjs.js')();
 assimpjs.then ((ajs) => {
     // import model
     let result = ajs.ImportFile (
-		// file name
-		'cube_with_materials.obj',
-		// file content as arraybuffer
-		fs.readFileSync ('testfiles/cube_with_materials.obj'),
-		// check if file exists by name
-		function (fileName) {
-			return fs.existsSync ('testfiles/' + fileName);
-		},
-		// get file content as arraybuffer by name
-		function (fileName) {
-			return fs.readFileSync ('testfiles/' + fileName);
-		}
-	);
+        // file name
+        'cube_with_materials.obj',
+        // file content as arraybuffer
+        fs.readFileSync ('testfiles/cube_with_materials.obj'),
+        // check if file exists by name
+        function (fileName) {
+            return fs.existsSync ('testfiles/' + fileName);
+        },
+        // get file content as arraybuffer by name
+        function (fileName) {
+            return fs.readFileSync ('testfiles/' + fileName);
+        }
+    );
 
     // parse the result json
     let resultJson = JSON.parse (result);