add CTAN info and stat badges [ci skip]

README.md

@@ -1,5 +1,8 @@
 # ShangHaiTech university THESIS (shtthesis)
-![Build](https://github.com/lirundong/sht-thesis/workflows/Build/badge.svg)
+[![Action status](https://github.com/lirundong/sht-thesis/workflows/Build/badge.svg)](https://github.com/lirundong/shtthesis/actions)
+[![CTAN version](https://img.shields.io/ctan/v/shtthesis)](https://ctan.org/pkg/shtthesis)
+[![GitHub release](https://img.shields.io/github/v/release/lirundong/shtthesis)](https://github.com/lirundong/shtthesis/releases/latest)
+[![GitHub downloads](https://img.shields.io/github/downloads/lirundong/shtthesis/total)](https://github.com/lirundong/shtthesis/releases)
 
 `shtthesis` project, forked from [`ucasthesis`](https://github.com/mohuangrui/ucasthesis), is an **unofficial** LaTeX thesis template for ShanghaiTech University and satisfies all format requirements in 《上海科技大学研究生学位论文撰写规范（初稿）》. The user just need to set `\documentclass{shtthesis}` and to setup mandatory information via `\shtsetup`, then his or her thesis document will be typeset properly:
 ```latex
@@ -20,9 +23,12 @@
 ## Get the Template
 - Stable version:
   - GitHub Release: please refer to [release](https://github.com/lirundong/sht-thesis/releases) page, and download required files based on release information
-  - CTAN: TODO
+  - CTAN: [`shtthesis`](https://ctan.org/pkg/shtthesis) package on CTAN can be installed via `tlmgr` for TeX Live and MacTeX users:
+    ```bash
+    tlmgr install shtthesis
+    ```
 
-    Note that `shtthesis` package in CTAN does not include the university logo file. Please download [`shanghaitech-logo.pdf`](shanghaitech-logo.pdf) from this repository and put it in the root of your project folder.
+    Note that `shtthesis` package on CTAN does not include the university logo file. Please download [`shanghaitech-logo.pdf`](https://github.com/lirundong/shtthesis/raw/master/shanghaitech-logo.pdf) from this repository and put it in the root of your project folder.
 - Develop version: directly clone the GitHub repo
   ```bash
   git clone https://github.com/lirundong/sht-thesis.git