add open pull request docs

Author: Ziya SARIKAYA

README.md

@@ -15,18 +15,20 @@ Press <kbd>F1</kbd> and narrow down the list commands by typing `extension`. Pic
 
 Simply pick the `Open in GitHub / Bitbucket` extension from the list
 
-##Install Manual
+## Install Manual
+
+### Mac & Linux
 
-**Mac & Linux**
 ```sh
 cd $HOME/.vscode/extensions
 git clone https://github.com/ziyasal/vscode-open-in-github.git
 cd vscode-open-in-github
 npm install
 ```
 
-**Windows**
-```
+### Windows
+
+```sh
 cd %USERPROFILE%\.vscode\extensions
 git clone https://github.com/ziyasal/vscode-open-in-github.git
 cd vscode-open-in-github
@@ -35,7 +37,7 @@ npm install
 
 ## Usage
 
-**Command**  
+### Command
 
 Press <kbd>F1</kbd> and type `Open in GitHub`.
 
@@ -45,27 +47,33 @@ Press <kbd>F1</kbd> and type `Copy GitHub link to clipboard`.
 
 ![copy](screenshots/copy.png?raw=true "Copy function")
 
-**Keybord Shortcut**  
+Press <kbd>F1</kbd> and type `Open Pull Request`.
+
+![copy](screenshots/pull-req-cmd.png?raw=true "Copy function")
+
+### Keybord Shortcut
 
  Press <kbd>Ctrl+L G</kbd> to activate.
  Press <kbd>Ctrl+L C</kbd> to copy active line link to clipboard.
- 
-**Context menu**  
+
+### Context menu
 
 Right click on explorer item and choose `Open in GitHub` or `Copy GitHub link to clipboard`.
 
 ![context](screenshots/context-menu.png?raw=true "Context menu options")
 
-**Configure custom github domain**  
- 
- Add following line into workspace settings; 
- ```json
+### Configure custom github domain
+
+Add following line into workspace settings;
+
+```json
 {
-	"openInGitHub.gitHubDomain":"your custom github domain here"
+  "openInGitHub.gitHubDomain":"your custom github domain here"
 }
-```  
+```
+
 Have fun..
 
 ## License
 
-MIT © [Ziya SARIKAYA @ziyasal](https://github.com/ziyasal)
+MIT © [Ziya SARIKAYA @ziyasal](https://github.com/ziyasal) & Contributors