Restructuring directories

- Currently the chrome extension package contains all the node_modules,
bower_components etc folder which causes its size to be super large.
- Ideally the chrome extension only needs the contents of the dist
folder along with the app icons and manifest.json
- Restructured the code in such a way that dist directory now get
created under the chrome extension directory.
- This way, we only need to upload the chrome-extension directory when
updating the app.