For anyone that uses ctags for quickly navigating the code (e.g. Vim
users), ignoring the various tags files generated all over the place
will be helpful. As I've found, a tags file needs to be generated for
certain subdirectories to avoid confusing ctags. For example, if I
run `ctags -R .` from the project root and I attempt to jump to the
definition of Execute from `cmd/kops/main.go`, I'm taken to the file
`channels/cmd/channels/root.go` instead of `cmd/kops/root.go`.
Maintaining one tags file for `cmd/kops`, however, doesn't produce the
same problem. This is why all tags files need to be ignored.