README updated

README.md

@@ -1,12 +1,16 @@
 # bm
+![LICENSE](https://img.shields.io/badge/license-MIT-green)
+![Proudly written in Bash](https://img.shields.io/badge/written%20in-bash-ff69b4.svg)
+![VERSION](https://img.shields.io/badge/version-0.1.0-blue)
 
 ![](./img/logo.jpg)
 
+
 **bm** comes from **Bookmark** as a short name. bm is a CLI tool for saving links on terminal easily. It has different features like adding new link, listing them, creating and saving under categories, deleting links or categories. 
 
 ## Motivation
 
-I always use terminal while making development. It stays open everytime. I compile, run, test the code or commiting the changes on GitHub on the terminal. In short, I try to do all my jobs while coding on the terminal. Again, due to my personal characteristics, I want to control my jobs from one place if it is possible. I mean I do not like to work with lots of different windows and tools. I try to manage all stuff from one or two applications/tools. I know there are different tools or ways to manage bookmarks, but I do not like using any other tools/applications except the necessary ones like IDE, terminal. That's why I wanted to build a CLI tool that manages the bookmarks. Also, the minor motivation was applying the **Bash** knowledge to real-world project. 
+I always use terminal while making development. It stays open everytime. I compile, run, test the code or commiting the changes on GitHub on the terminal. In short, I try to do all my jobs while coding on the terminal. Again, due to my personal characteristics, I want to control my jobs from one place if it is possible. I mean I do not like to work with lots of different tools. I try to manage all stuff from one or two applications/tools. I know there are different tools or ways to manage bookmarks, but I do not like using any other tools/applications except the necessary ones like IDE, terminal. That's why I wanted to build a CLI tool that manages the bookmarks. Also, the minor motivation was applying the **Bash** knowledge to real-world project. 
 
 ## Example
 
@@ -24,10 +28,28 @@ $ ./bm delete 1 3 4     # Delete the given bookmark ids in default category, bm
 $ ./bm delete -c Reading 1 4 5  # Delete the given bookmark ids by given category
 ```
 
+## Usage
+
+If you want to see usage of the command, just add `--help` or `-h` flag as follow.
+
+```shell
+$ ./bm --help           # CLI usage
+$ ./bm add --help       # add usage
+$ ./bm list --help      # list usage
+$ ./bm delete --help    # delete usage
+$ ./bm remove --help    # remove usage
+```
+
+You can enter multiple category or id in commands. **bm** handles all of them. There is an exception for it when you want to delete bookmarks by category. You need to type just one category. Otherwise, **bm** understands them as a bookmark id. 
+
 ## Demo 
 
 ![bm demo](img/demo.gif)
 
+## Contribution
+
+Contributions are welcome. But, the project is still under development by me. That's why I may not accept the pull requests from you, but we can discuss in issues if you open issue.
+
 # LICENSE
 
 [MIT](./LICENSE)