General

Various new tables/anchors
Zoom support for pokedex reorder tabs
New hma script for removing Contest moves tab (thanks Shiny!)
Allow division-based calculated segments (thanks Shiny!)
Added alt-key shortcuts for the developer-assist menu items
Disable AllowMultipleElementsPerLine by default, HMA will prefer putting one element per line, even if not using all horizontal space. This should help new users and can be toggled back to the old behavior in the toolbar.
Added some cool copyright screens to the resources directory (thanks @Yogia16!)

Map Editor

Improve Goto to match map names more easily.
"Show Uses" can now show uses of data elements within maps
Allow switching a trainers ID from the map editor, allow creating a trainer script from an existing trainer team
Add 'Legendary Encounter' object template
Visual data options like OWs/Palettes show ID an visual instead of just visual
Create script from pointer in object panel
Hold Ctrl to hide all events on a map, letting you see the blocks below.
New map drawing options, including 9-grid, block mixing bag, and smart fill
Track bank selection for creating new maps
Show selection width/height along with selection x/y
Most drop-downs now support typing/filtering
'Invisible' characters now appear semi-visible
Repoint Border button in the border editor, edit tileset button in blockset editor
Broken warps look different from working warps
Cells that have the same block but different collision are now highlighted with a yellow border
Event IDs are shown in the event panel (useful for warps)
Copy/paste layer option when editing blocks

jumpiftype / fadescreen argument improvements
new macros for msgbox commands and if statements
Use named labels when decompiling scripts. The address still appears as a comment.
Insert } when the user adds a {

Selection tool in image editor now treats color 0 as transparent, and won't include it when moving objects around.
Paint tool can now paint 'transparent' on tilemaps/sprites that don't use palette 0 (like Oak in the newgame sequence).

Moved to the Tools menu, added keyboard shortcut
standard lib imports like import random now work
enums can be set to numbers as well as strings
Allow getting tables using [], such as editor[0]['data.pokemon.stats']. Useed to share data between multiple tabs.
Update tutorial text