Create README.md

Tatamo · web-flow · commit 456bab0f0195 · 2018-12-02T17:49:08.000+09:00
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+# atcoder-cli
+[AtCoder](https://beta.atcoder.jp/) command line tools
+- get contest information
+- create a project directory for contests
+  - auto provisioning with custom templates
+- linkage with [online-judge-tools](https://github.com/kmyk/online-judge-tools)
+    - submit your code without specified URL
+    - auto downloading of sample inputs/outputs
+
+## Requirements
+node.js  
+[online-judge-tools](https://github.com/kmyk/online-judge-tools) (optional, but recommended)
+
+## Install (NOT PUBLISHED YET)
+```sh
+$ npm install -g atcoder-cli
+```
+
+## Usage
+```sh
+$ acc login # login your atcoder account
+$ acc session # check login status
+$ # your login session will be saved to a local file, but your password won't be saved
+$ # to delete the session file, use `acc logout`
+$ acc new abc001 # "abc001/" directory will be created
+$ cd abc001/
+$ acc contest # show the contest information
+$ acc tasks # show task list
+$ acc add
+$ cd a/
+$ vim main.cpp # write your solution
+$ acc submit main.cpp # to use submit function, you have to install online-judge-tools
+```
+
+To get detailed information, use
+```sh
+$ acc [COMMAND] -h
+```
+
+## Config
+```sh
+$ acc config -h
+$ acc config # show all global options
+$ acc config <key> <value> # set option
+$ cd `acc config-dir`
+$ cat config.json # global config file
+```
