Updated readme

README.md

@@ -1,5 +1,24 @@
 [![Build Status](https://travis-ci.org/fourier/maze-gen.svg?branch=master)](https://travis-ci.org/fourier/maze-gen)
 # Maze Gen - Procedural maze generation in Common Lisp
+## Features
+Currently implemented the following algorithms:
+- Binary tree
+- Sidewinder
+- Aldous-Broder
+- Wilson's
+- Hunt-and-Kill
+- Recursive Backtracker"
+
+It is possible to automatically generate the longest path. The distance
+between start/end points of the longest path could be graphically presented
+as an intensity of the color.
+
+It is possible to export generated maze as either a png image, or to the
+format which is accepted by the TrenchBroom editor of maps for Quake1, 
+effectively to preview the maze in 3d.
+
+## Examples/Screenshots
+
 ![example1](https://github.com/fourier/maze-gen/raw/screenshots/screenshot1.png "Example 1")
 ![example2](https://github.com/fourier/maze-gen/raw/screenshots/screenshot2.png "Example 2")