Implemented static file manager - "Bower"

Now our static files will be managed by **Bower**.
- **Bower.json** file added for the project.
- All the static files will be downloaded in ```static/ndf/bower_components``` by bower
- ```bower_components``` added for exclusion in ```.gitigore``` file
- Regarding installation instructions are added to ```INSTALL``` file.
- Removed concern static files from the repo.

**NOTE:** To run the project, we need to follow instructions specified in the INSTALL file*