Remove inconsistency in naming convention between `installation` and `uninstallation`.

[a-t-0]

      <p>Currently,  the filenames do not include the <code>installation</code> keyword for installation files, but the <code>uninstallations</code><strong>is</strong> included in uninstallation files. This is inconsistent.<br>

For example: custom_0_get_anaconda_install_script for an installation file, but custom_uninstall_0_anaconda.

• add the install keyword to the filenames of installation files.

[a-t-0]

      <p>Can I work on this?</p>

[a-t-0]

      <p>That would be awesome! If you assign yourself (to this issue), the <em>Create Issue Branch Application</em> in GitHub automatically makes a separate branch (for you) for this issue. It would be awesome if you work on this, and send a pull request when you are happy with the result:)</p>

I also wrote a bit about the (current) structure of the repository in the Readme, I hoped that might be insightful in understanding how the code is structured. If you have any questions, please share them as comments in the issues.