Removed libgit usage and remote repositories support from the TODO
list. The former isn't very perspective given the current state of
libgit and the latter would be quite hard to do reasonably w/o the
former.
Fix iterating over GIT tags. This involves renaming read_data_impl()
to read_data() and exporting it, since we want to feed it with
absolute path, therefore fs::path.
Use GIT author for the standard authorcert and stuff the committer
to a gitcommit-committer cert. (It was the other way before.)
Hopefully generally agreed on IRC.