Create an "Undo" feature

[Flaque]

If users enter in the wrong template or they use the command in the wrong place, it may be nice to have an "undo" command by typing:

$ thaum -u

This could be implemented by writing to a temporary file. (afero) has a function for this. In that file, you could store a checksum and the path of each file that you created.

Then, when the user calls thaum -u, you check to see if there is a temporary file and you match the checksums of each file against the ones stored. That way we don't remove files that people have edited.