Ighalsk - release 0.1.13

I released Ighalsk v0.1.13 last night; it can be downloaded from its SourceForge project page here.

Here are the changes since v0.1.12:
* Can now add up stairs and corridors in the Level Editor. Corridors in particular were tricky since the editor (or some other class) needed to store the start point until the end point had been selected. In fact you can add corridors between any 2 points; the editor will add two corridors (one vertical and one horizontal) between those points.
* Walls are now only shown if seen nearby or remembered (if they have been seen before). In the previous release, monsters were only shown if they were nearby; this release is now more consistent between monsters and walls, though all treasures and stairs in a level are visible at all times ...
* Visibility (the Hero's map) is saved to file, so that a loaded game will have the same memory of walls as when it was saved.
* Refactored Monster Editor and Monster to simplify both by removing duplication - Monster Editor now uses the underlying dict that holds monster definitions more directly. Editing a monster's attack and resists are still special cases.
* Started moving methods from LevelViewer to LevelFormatter so that they can be tested.
* Added 15 new monsters, including Doom Merchant, Gloomhound, Lesser Mook, Huntsman Professor and Wool Golem. Renamed Zombie to Zythar Feeder; added Zythar Axeman and Zythar Deathbringer. I picture Zythar as semi-undead, crazed beings with gleaming green eyes; the Axemen wear black ribbons attached to their helmets.
* Added Monsters for level 4 of each quest. There are some monsters in this new batch of 15 that can't be encountered yet - I'm saving them for level 5 of the quests.

I've got a few features that I'd still like to add in before v0.2.0, as follows:
* Add functionality to the Level Editor to add rectangular rooms, circular rooms and their inverses (filled-in rectangles and circles of walls), zig-zag corridors and a shortcut out of the quest dungeon;
* Refactor the Monster Editor further to simplify the code, and extract editing attacks and resists to a new screen; then adding multiple attacks and possibly descriptions to a Monster;
* Add new damage types, in particular cold, lightning and poison - at this stage, poison wouldn't have the slow draining of health effect, but would be like any other damage type;
* Add Awareness and Stealth attributes and interaction, as a friend of mine suggested, so that some monsters can creep up on you if they've got high enough Stealth and you've got low enough Awareness ...

The Awareness and Stealth functionality would also allow invisible monsters, though I'd prefer to wait to introduce them until I've also added some kind of Detect Invisible power, which would have the effect of increasing Awareness for a time - it's only fair to the Heroes.