update README

README.md

@@ -1,7 +1,36 @@
-[![Build Status](https://travis-ci.org/shijiashuai/thundersvm.svg?branch=travis)](https://travis-ci.org/shijiashuai/thundersvm)
-# ThunderSVM
-## Documentations
-The documentations are available [here](https://thundersvm.readthedocs.io) in Readthedoc.
+[![Build Status](https://travis-ci.org/zeyiwen/thundersvm.svg?branch=master)](https://travis-ci.org/zeyiwen/thundersvm)
+
+<div align="center"><img src="https://github.com/zeyiwen/thundersvm/raw/improve-doc/logo.png" width = "30%" height = "30%" align=left/>
+</div>
+
+# Overview
+The mission of ThunderSVM is to help users easily and efficiently apply SVMs to solve problems. Some key features of ThunderSVM are as follows.
+* Support one-class, binary and multi-class SVM classification, SVM regression, and SVMs with probability outputs.
+* Have Python, R and Matlab interfaces.
+
+## Getting Started
+### Prerequisites
+* [CUDA](https://developer.nvidia.com/cuda-downloads)
+* cmake > 2.8
+* gcc > 4.8
+### Download
+```bash
+git clone git@github.com:zeyiwen/thundersvm.git
+```
+### Build
+```bash
+cd thundersvm
+mkdir build && cd build && cmake .. && make -j
+```
+### Quick Start
+```bash
+bin\thundersvm-train -c 100 -g 0.5 ../dataset/test_dataset.txt
+bin\thundersvm-predict ../dataset/test_dataset.txt test_dataset.model test_dataset.predict
+```
+### Run Tests
+```bash
+make runtest
+```
 
 ## API
 [API Reference](http://zeyiwen.github.io/thundersvm/)