love.physics: simplify Body and Shape API.

#1130

- Shapes are now directly attached to Bodies when they're created (similar to love 0.7 and older).
- Fixtures are removed.
- All methods that were in Fixtures now exist in Shapes.
- All APIs that used or returned a Fixture now do the same with a Shape.

- Add new love.physics.new*Shape variants that take a Body as the first parameter.
- Deprecate the new*Shape APIs that don't take a Body.
- Deprecate love.physics.newFixture (the deprecated function now returns a Shape).
- Replace Body:getFixture and Body:getFixtures with Body:getShape and Body:getShapes (Body:getFixtures is deprecated).
- Replace World:queryFixturesInArea and World:getFixturesInArea with World:queryShapesInArea and World:getShapesInArea (queryFixturesInArea is deprecated).
- Replace Contact:getFixtures with Contact:getShapes (Contact:getFixtures is deprecated).
- Replace all love.physics callback Fixture parameters with Shape parameters.
- Deprecate ChainShape:getChildEdge.

src/common/deprecation.cpp

@@ -107,8 +107,12 @@ std::string getDeprecationNotice(const DeprecationInfo &info, bool usewhere)
 
 	if (info.apiType == API_FUNCTION)
 		notice << "function ";
+	else if (info.apiType == API_FUNCTION_VARIANT)
+		notice << "function variant in ";
 	else if (info.apiType == API_METHOD)
 		notice << "method ";
+	else if (info.apiType == API_METHOD_VARIANT)
+		notice << "method variant in ";
 	else if (info.apiType == API_CALLBACK)
 		notice << "callback ";
 	else if (info.apiType == API_FIELD)
@@ -188,7 +192,9 @@ MarkDeprecated::~MarkDeprecated()
 STRINGMAP_BEGIN(APIType, API_MAX_ENUM, apiType)
 {
 	{ "function", API_FUNCTION },
+	{ "functionvariant", API_FUNCTION_VARIANT },
 	{ "method",   API_METHOD   },
+	{ "methodvariant", API_METHOD_VARIANT },
 	{ "callback", API_CALLBACK },
 	{ "field",    API_FIELD    },
 	{ "constant", API_CONSTANT },

src/common/deprecation.h

@@ -32,7 +32,9 @@ namespace love
 enum APIType
 {
 	API_FUNCTION,
+	API_FUNCTION_VARIANT,
 	API_METHOD,
+	API_METHOD_VARIANT,
 	API_CALLBACK,
 	API_FIELD,
 	API_CONSTANT,