Merge pull request #253 from pornel/master

Expanded readme

Author: kornelski

README.md

@@ -1,15 +1,23 @@
 Mozilla JPEG Encoder Project
 ============================
 
-This project's goal is to reduce the size of JPEG files without reducing quality or compatibility with the vast majority of the world's deployed decoders.
+MozJPEG reduces file sizes of JPEG images while retaining quality and compatibility with the vast majority of the world's deployed decoders.
 
-The idea is to reduce transfer times for JPEGs on the Web, thus reducing page load times.
+MozJPEG is based on [libjpeg-turbo](https://github.com/libjpeg-turbo/libjpeg-turbo). It's compatible with libjpeg API and ABI, and can be used as a drop-in replacement for libjpeg. MozJPEG makes tradeoffs that are intended to benefit Web use cases and focuses solely on improving encoding, so it's best used as part of a Web encoding workflow.
 
-'mozjpeg' is not intended to be a general JPEG library replacement. It makes tradeoffs that are intended to benefit Web use cases and focuses solely on improving encoding. It is best used as part of a Web encoding workflow. For a general JPEG library (e.g. your system libjpeg), especially if you care about decoding, we recommend libjpeg-turbo.
+MozJPEG is meant to be used as a library in graphics programs and image processing tools. We include a demo `cjpeg` tool, but it's not intended for serious use. We encourage authors of graphics programs to use MozJPEG's [C API](libjpeg.txt) instead.
 
-More information:
+## Features
 
-* [Mailing List](https://lists.mozilla.org/listinfo/dev-mozjpeg)</a>
-* [Version 3.0 Announcement](https://boomswaggerboom.wordpress.com/2014/12/30/mozjpeg-3-0-released/)
+* Progressive encoding with "jpegrescan" optimization. It can be applied to any JPEG file (with `jpegtran`) to losslessly reduce file size.
+* Trellis quantization. When converting other formats to JPEG it maximizes quality/filesize ratio.
+* Comes with new quantization table presets, e.g. tuned for high-resolution displays.
+* Fully compatible with all web browsers.
+* Can be seamlessly integrated into any program using libjpeg.
+
+## Releases
+
+* [Latest release](https://github.com/mozilla/mozjpeg/releases/latest)
+* [Version 3.0 Announcement](https://boomswaggerboom.wordpress.com/2014/12/30/mozjpeg-3-0-released/) ([overview of 3.0 features](https://calendar.perfplanet.com/2014/mozjpeg-3-0/))
 * [Version 2.0 Announcement](https://blog.mozilla.org/research/2014/07/15/mozilla-advances-jpeg-encoding-with-mozjpeg-2-0/)
 * [Version 1.0 Announcement](https://blog.mozilla.org/research/2014/03/05/introducing-the-mozjpeg-project/)