Win32: Fix broken "Save as..." dialog in editor mode when engine is started with forward slashes in scenario path
Added GetStartupPlayerCount script function
Rework logging of unfreed C4Strings a bit
Added support for scripted maps (Map.c) and documentation.
Fix script errors in scenarios that don't load Objects.ocd
Test scenario: Local defs only
Scripted map drawing: Fix integer overflow issues for large maps in MAPALGO_Ellipsis and MAPALGO_Polygon
Fix error message in C4MapScriptAlgo::GetXYProps
FnLayerSetPixel also takes string parameter for pixel color
Some Library_Map extensions
New experimental scenario: Frosty Summit.

At the moment, the round is a bit too short I think :)
Fixed MinPlayer in some experimental scenarios
FrostySummit: Fixed some scenario properties.
Added some C4MapScript stubs for mape
Fix some C4MapScript dependencies
autotools: Catch up to C4MapScript
Script: Ignore attempts to set Scenario.Prototype

This is mostly for the benefit of savegames, which rely on being able to
save scenario functions as Scenario.Prototype.*, but also removes an
opportunity to break things.
Added script function array MapLayer.CreateMatTexMask(any mask_spec).

Returns mask_spec as an array of 256 bools to be used e.g. in conjunction with the return value of GetPixel.
Fix MapLayer functions on derived prop lists (#935)
Clean up some superfluous includes