ansiview - add ability to download file

Some text files are rather long and a user could use up their time reading it.

Suggestion: Add download = to the .ini file which could either accept "yes" to allow download of all files, or a list of extensions that someone could download. For example you may allow download of .txt but not .ans for example. You'd need to use a period prefix incase someone decided to have .yes files (never seen 'em, but don't put it past anyway).

For those files that someone is reading, the prompt could have a "press D to download or any key to continue". It would then transfer using their favorite transfer method.