New rotation system (see forum thread).

Major changes:
  - when rotating, the top left corner of the rectangle stays in place.
  - ValueViewers get a dc that is pre-rotated/translated for them, i.e. (0,0) is the top-left of the viewer (with ValueViewer::getRotation).
  - moved 'angle' from individual Styles to the Style base class.
  - any rotation angle is now possible. angle is still an int for now.

This warrants a version bump

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@782 0fc631ac-6414-0410-93d0-97cfa31319b6

src/data/field/choice.cpp

@@ -178,7 +178,6 @@ ChoiceStyle::ChoiceStyle(const ChoiceFieldP& field)
 	, choice_images_initialized(false)
 	, combine(COMBINE_NORMAL)
 	, alignment(ALIGN_STRETCH)
-	, angle(0)
 	, thumbnails(nullptr)
 {}
 
@@ -291,7 +290,6 @@ IMPLEMENT_REFLECTION(ChoiceStyle) {
 	REFLECT_N("mask",mask_filename);
 	REFLECT(combine);
 	REFLECT(alignment);
-	REFLECT(angle);
 	REFLECT(font);
 	REFLECT(image);
 	REFLECT(choice_images);