3D floors are now updated in real time in visual mode when their control sector is sloped through the line slope action. Fixes #250.

* Adding check for missing activations on lines that have an activation-requiring action

* Adding skip check if the map isn't UDMF

* Oops, typo in name of check

Added: string/float user variables, //$UserDefaultValue <value> for specifying default user variable value

Fixed: GZDB wouldn't load plugins on certain paranoid systems due to plugin DLL's being "remote" and unsigned (reported by Lorenzo)

Fixed null reference in visual mode when trying to render a thing without a sector (reported by Ozymandias81)

Updated Unreal model loading to the fixed behavior in GZDoom - axes were remapped incorrectly (I blame Marisa_Kirisame)

Actually fixed vertex axes in Unreal models.  Fixed the order of rotations in MODELDEF Offsets (this was not releavent to Unreal issues)

Fixed: GZDB was built against wrong SlimDX version (including 64-bit which was built against 32-bit SlimDX) - (reported by StrikerMan780, leodoom85, Rockstar Racoon)

Fixed (?): The new .NET 4.6.x JIT method inlining was fucking with GetCallingAssembly-based plugin detection

Fixed: made more correct checking for legal file formats; now it should actually validate the format upon loading

Fixed: flats are now unconditionally detected as Doom Flat if they are exactly 4096 bytes long and inside F_ markers or flats directory.  (reported by Chickenlegz)

Did some maxcode refactoring about dynamic lights;  added initial spotlight support (at least they are recognized as lights now)

Added support for non-1.2 pixel ratios if view stretching is enabled (reported by Nash);  Fixed: map names in quotes were not recognized properly.