- give absolute paths to imgsize() so it chills out on Cwd::getcwd() calls
- rip out App::WRT::MethodSpit's convenience accessors and just access
  elements of $self directly
- kill local_path()
- stop using a() in entry_markup()
- cache get_date_entries_by_depth() results
- swap out state vars for stashing things on $self in
  get_all_source_files()

This gets rendering the whole p1k3 repo back down in the neighborhood of
2.1 seconds, which is a lot more tolerable than 5 or 6.

It also kinda technically breaks the API, maybe, so I guess this'll be a
v5.0.0 after a while.

All replaced with get_recent_entries_by_depth().

Replaces generate_month_lists with more generic generate_date_hashes(),
which now puts year, month, and day level entries in the prev/next hashes.

Strips previous links out of month() - these can live in templates now,
I guess, and work for year, month, and day.

Replaces get_all_day_entries() with get_date_entries_by_depth().  Adds
generate_month_lists() to stash %prev_months and %next_months (this can
probably be generalized a bunch).

Generalizes sortable_date_from_entry() to work with different levels of
date.  Assumes that no component of the date is more than 4 digits, which
is not very future proof.  (Though if this code is still running in the
year 10000, the future will have gone very differently than I expect it
to.)

month_before() now uses the %prev_months and %next_months hashes.

Removes fulltext(), because you can just call get_date_entries_by_depth(3).

Much slower than it probably needs to be.

Shuffles a bit of stuff out of App::WRT::Renderer into App::WRT, including
the method now called get_all_source_files() and a new one called
get_all_day_entries() that returns a sorted listed of days.

Uses state variables to cache the get_all_source_files() data, as well
as month_before() data (this was previously memoized inside a closure).

App::WRT::feed_print() now takes a list of entries instead of a month to
render the feed for.

App::WRT::feed_print_latest() gets a feed with most recent feed_length
entries.

It's weird to have this hardcoded, and there's
context on each entry anyway.

The default was `$0?`, which I think was probably a holdover from this
being invoked as a CGI script.  `$0` would give the name of the current
script, so you'd wind up with `display.cgi?2008` or what-have-you.

Adds a wrt-init kind of on the model of git init for starting a stub
directory with wrt.json, archives/, publish/, and templates/.

Also starts to tweak POD a bit.

I went and read:

https://pause.perl.org/pause/authenquery?ACTION=pause_namingmodules

Realized I should probably not name this something with an inscrutable
top-level namespace.  WRT is still inscrutable, I guess, but at least
it's now under App.

- Renames all modules, fixes tests (such as they are)
- Zaps old t/validate/ stuff

This hadn't been in use for a while anyhow.

- create an index.html with new entries
- create an /all/index.html with a list of all entries
- create a /feed containing an atom feed of the most recent month
- a paragraph on requirements in the installation section
- copyright date through 2017

This will probably eventually bite me, since it could overlap with other
entry display logic, but it doesn't seem to break anything at the moment.

This is a fairly p1k3-specific thing.

- adds include_process() in WRT::Markup
- moves eval_perl() into WRT::Markup.  The way object instances are
  composed (and instance methods called) here still feels pretty janky,
  and this does nothing to help the situation.
- changes all existing $root_dir instances to $entry_dir; adds a $root_dir
  which represents the root of the archive (top-level folder containing
  the wrt.json file)

I'd be worried about the $root_dir change if I thought this module had a
single other user in the wild, but I strongly doubt that it does.  If I
am wrong and you are that user, I apologize sincerely in advance.

The include feature still has fairly unsettled semantics, but it gets the
whole thing much closer to a usable site generator.

Now uses:

  wrt display
  wrt render-all
  wrt fcgi

It's shorter and the letters are all right there on the keyboard.