* Introduce utility method to look up drive props by drive name.
* Make /drive/create endpoint fetch file ending from properties data structure; update tests
- class method to get arbitrary file contents
- new web UI endpoint to fetch the contents of rascsi man pages (rendered txt files)
- Link to manpage in page footer
- Link to new wiki page for image type docs
- Other UI tweaks
* Read the drive properties file once and store it in the Flask app config. Spin out the drive properties formatting to a helper method.
* Add empty removable disk drives to the attach peripherals UI
* Refinement of UI labels and help text, moving some context to the wiki
