Added license header in the code files as mentioned in issue #3

Added license header in the code files as mentioned in [issue3](https://github.com/WiseEarthTechnology/CrisisCommunicator/issues/3)  in the below format:

```bash
Filename: <insert filename> 
Authors: <insert authors>
Copyright: Wise Earth Technology
This file is part of the CrisisCommunicator Project.  
It is licensed under the Peaceful Open Source License.  
Please see the license terms in PeaceOSL.txt
```