Updates for Meia Gisborn, Jura Basil Elden, and Revy.

Meia:
* updated her model, including all her ingame and epilogue sprites.  Various tweaks to epilogue spritework/mechanics.  Also added several poses.
* added 19 targeted/generic lines (total now 11806 unique lines).  Fixed some typos and wording.

Jura:
* updated her model, including all her ingame and epilogue sprites.  Also tweaked her epilogue spritework/mechanics and added several poses.
* added 9 targeted/generic lines (total now 9383 unique lines).  Also fixed some typos and wording.

Revy:
* added a new pose, 5-stripped.png.
* added 10 targeted/generic lines (total now 8246 unique lines).

All images compressed via TinyPNG.  Added new Kisekae codes for Meia's and Jura's updated models.

With this update, you can easily play with all alternate character costumes just by selecting them in the offline version of the game. No more moving around folders, it's as easy as selecting your favourite outfit from a drop-down menu!

Character outfits implemented:
- D.Va Black Cat
- D.Va Cruiser
- Ghost Bride Weiss
- Dark Pit
- RagnaRinkah
- Rinkah Charlotte
- Ruby Volume 4
- Weiss Volume 4
- White Raven
- Valentine Zone-tan

I hope you all had a dark and spooky Halloweek!

Changes all alternate character costumes to their normal outfit, and moves all alternate character costume images in the saves/reskinned_opponents folder.

- Changes costumes for Rinkah, D.Va, Pit, Raven and Weiss. (RagnaRinkah is coming later this week)
- Changes the order of the roster
- Defaults the Haunted Forest background
- Adds a few targeted lines from Zone-tan towards the White Raven costume

Fully compresses via TinyPNG:

-Asuna

-Blackrose

-Blake

-Buffy

-Chell

-Daisy

-Elena

-Hermione

-Jasmine

-Kim

-Kyoko

-Meg

-Revy

-Rosalina

-Ruby

-Sayla

-Videl

-Weiss

-Xander

-Yang

-Zoey

and Partially Compresses Raven and Seven of Nine.

- Adds a new background: "Romantic"!
- Adds an epilogue to Zone-tan!
- Adds an alternate outfit to Zone-tan: "Zone-tan Valentine"!
- Defaults Ruby and Weiss' V4 outfits

The new background will be defaulted for the week, along with Ruby, Weiss, Zone-tan and D.Va's alternate outfits and their corresponding dialogue.

Saving slightly more than 2 MB

- The previous commit put these in the /sp/opponents/ folder instead of
just /sp/
- Most mages might be identical, but all are included in the commit just
in case
- Renamed text documents to original names only so that we can see the
line-by-line diff
- Grouped targeted lines together in dialogue document, as these are a
pain to locate and paste in one by one
- Some targeted Ruby lines had double case tags, so the latter was
overriding the former. These are now all multiple state tags within a
single case.