Installation notes, future directions

As of June 26 2021, we added an installation script and more detailed installation instructions. Our aim is to add specific installation scripts so that most computer users can use our library (we will eventually cover popular distributions of Linux, Windows, and Macs). Many engineers in the imaging informatics community use simpleITK. For users with simpleITK a function which copies out the jpegs is included. We will add a similar function for users of the pydicom library. These optional dependencies can create conflicts depending upon the user's environment. Therefore we are planning to eventually create a code-free version that will ease use for not only biomedical engineers who work with radiology images, but also for medical doctors who may have no coding skills.