v0.9 • 2012-01-05	• initial release
v1.0 • 2012-01-05	• added pawn promotion (to queen only)
					• added en passant tracking in FEN (FEN now complete)
					• added functions to convert internal position arrays into
					  algebraic notation, and vice versa
v1.1 • 2012-01-05	• added file and rank guides
					• added 'turn' class to all elements which need rotating
v1.2 • 2012-01-07	• fixed a stupid bug related to castling, wherein
					  pieces on 1 and 8 would turn to opposite castles
v1.3 • 2012-01-07	• changed move data from GET to POST
					• move data is now one piece of data (fromx,fromy:tox,toy)
					• spaces are now <button> elements rather than <a> elements
					• board is wrapped in a <form>
					• FEN box also uses POST now
					• Board state href passes through urlencode()
					  This means that FENipulator now validates.
v1.4 • 2012-01-07	• added 'empty' class for empty spaces
					• added 'inactive' class to inactive pieces/spaces
					• added 'active' class to from space and to piece
					• once move has been made, no more live buttons
					  (meaning user must submit URL or reset turn)
v1.5 • 2012-01-10	• added options.php and options menu
					• added 960.php for generating Fischer/960 boards
					• revamped castling code to allow for 960 castling
					• one's own rooks & kings are now possible to move 
					  one's own king onto, provided that player can castle
					  at all. in the future this will properly check if
					  player can castle to the given side
					• stylesheet changes — 6pt padding on many elements for
					  a bit of breathing room, links are grey
					• download & version history links moved to options menu
					• simple total valuation of pieces added to status box,
					  based on 1, 3, 3, 5, 9 scheme
					• pawns can now be underpromoted via a setting in the
					  options
v1.6 • 2012-01-10	• added preliminary support for large boards
					  castling for large board variants is untested and
					  questionable how to make it work for both styles
					  while maintaining 960 castling
				    • rewrite of FEN number interpreter to allow 2-digit nums
				    • added fairy pieces 'archbishop' and 'chancellor' (a,c)
					  to simple and unicode piecesets
					• added shortcuts to several large board setups. enter into
					  FEN field: grand, gothic, embassy, capablanca
v1.7 • 2012-01-12	• added Alice variant via Alice.php
					• some changes to CSS to accomodate Alice
					• Alice has two $board states and a new FEN method
					  represented by board|board in place of board
					• castling and en passant disabled for now in Alice
v1.8 • 2012-01-15	• major overhaul to index.php & alice.php — moved shared
					  functions over to 'shared.php.'
					• all variant names, shortcuts, urls, and starting FEN are
					  store in variant-list.php. Variants are now all handled
					  via the new variant_handler function.
					• added Cheshire Cat variant. this is handled by index.php
					  BUT only when called via a symlink 'cheshire.php.' Code
					  not different enough to warrant an actual separate file
					• added variable $base_variant equivalent to the current
					  file name (index, cheshire, alice, &c). This handles the
					  above, as well as any references to URL. May eventually
					  be possible (wise?) to merge alice in this way.
					• change to style.css to add :after code for .hole in 
					  Cheshire. this should be in piecesets (or boards?) 
					  eventually — style.css is a temporary solution.
					• FEN uses a dot to represent a hole in Cheshire
					• Small variants added to variant-list.php
					• * is now an acceptable turn in FEN, without turn 
					  restrictions. Setting turn to * also opens up the piece
					  rack above the status bar, allowing pieces to be dropped
					  on the board. This is handled clumsily, but i think it's
					  alright (for now, at least). This works in both index
					  and alice.
v1.9 • 2012-01-16	• added quick submit link via email box
					• some cookies / options still a little weird, namely
					  the checkboxes — summary and email. hopefully not a huge
					  issue, but very odd.
					• added option for display email box yes/no
					• mail.php handles the email, displays error on null to
					  or from address. submits fen & from, uses some cookies
					  to try to intelligently remember to/from addresses.
					• added horde, dunsany, racing chess variants
					• added .link for <button>s, make some submit buttons that
					  aren't out of place. such buttons now exist for
					  submitting FEN and email
					• added js (boo) to aforementioned text fields to catch
					  enter — chrome being weird with them. might be 
					  unnecessary now that submit buttons are visible, 
					  will test tomorrow.
					• few CSS tweaks — fonts now declared serif, 
					  font-size 10pt, margin-bottom 
					  (thing is starting to get tall)
					• email box does not yet exist in alice.php
v1.91 • 2012-01-16	• added blank FEN generator to shared
					• added blank shortcut handler (blankWxH where W is width
					  and H is height) to index.php
					• minor CSS changes related to Cheshire Cat Chess
					• blank generating form added to variants.php
v1.92 • 2023-05-26	• add rel='nofollow' to most links 'cause crawlers were
					  costing me money
					• dark mode