Merge pull request #37 from virresh/cleanup

Update README

README.md

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+# Sahaayak
+
+Your learning partner  
+
+OpenVidu used for supporting video calls.  
+Firebase is powering the backend.  
+NodeJS code for push notifications is not in this repository currently.  
+
+#### Setting up OpenVidu
+Ensure you've generated your debug keys. If you're unsure on how to do that, `openvidus_extras/script.sh` has the steps commented.  
+
+Set-up docker  
+```bash
+sudo apt-get install docker.io
+```
+
+Navigate to the folder openvidu_extras. Run script.sh with  
+```bash
+./script.sh
+```
+
+This will setup a server on your machine.  
+
+#### Referring to OpenVidu server
+Best way is to setup a URL key-value entry in the root of your firebase database to allow dynamic changes in the IP. However, if you still want to do it with a static IP, here are the steps:  
+
+- In the strings.xml file, replace the IP Address with your machine's IP Address.  
+  For example,  
+  ```xml
+   <string name="default_openvidu_url">https://192.168.0.8:4443/</string>
+  ```
+- Make sure to replace the code for fetching URL dynamically inside the app for using the above resource string.  
+
+192.168.0.8 is your system's IP Address.
+
+Build the app and run it.
+