Verbose output

[clipperhouse]

Create a -v(erbose) command-line flag to give output describing the steps and methods being created. This will be helpful for troubleshooting, e.g., to explain why certain methods are not generated for, e.g., non-numeric or non-ordered types.

[hut8]

I know this is somewhat of an old issue, but I just spent a bit of time with // +gen set not doing anything before I realized that it's under the "optional" section. At the least, don't you think that should print out an error message, saying that it doesn't know where to find the set typewriter? I could add this if you would like.