Updated README.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
Removed old square NodeActivity buttons.

The buttons are being replaced with icons that match the layout a lot
better.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
Updated ic_launcher via optimizations.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
Updated bookmarks and settings icons.

These are the updated resources for NodeActivity. They look nicer and
don't stand out as much.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>