Removed blinking cursor and non-blocking getch()

A couple of UX tweaks:

- `curs_set(0)` removes the blinking cursor from the animation.
- The combination of `nodelay(stdscr, TRUE);` and `getch();` handles any input whilst the animation is running *(non-blocking)*. This stops it's being display in the terminal after the command finishes. 
- Trailing whitespace was auto-removed by emacs when adding previous two points.