Update README.md

[Savvasun]

This pull request updates the README.md file to look better with new features. Here is the 'changelog':

• Changed the 'TODO' list to have checkboxes instead of crossed-out text

  • Now the items look like this:

• [x] Like this

  • Instead of this:

• Like this

• Changed all the dot lists to use *s instead of -s

[atomcorp]

That's cool! Thanks!