Entities redesign and a few ERM features

* Made most Handlers derived from CHandlerBase and moved service API there.
* Declared existing Entity APIs.
* Added basic script context caching
* Started Lua script module
* Started Lua spell effect API
* Started script state persistence
* Started battle info callback binding
* CommitPackage removed
* Extracted spells::Caster to own header; Expanded Spell API.
* implemented !!MC:S, !!FU:E, !!FU:P, !!MA, !!VR:H, !!VR:C
* !!BU:C, !!BU:E, !!BU:G, !!BU:M implemented
* Allow use of "MC:S@varName@" to declare normal variable (technically v-variable with string key)
* Re-enabled VERM macros.
* !?GM0 added
* !?TM implemented
* Added !!MF:N
* Started !?OB, !!BM, !!HE, !!OW, !!UN
* Added basic support of w-variables
* Added support for ERM indirect variables
* Made !?FU regular trigger
* !!re (ERA loop receiver) implemented
* Fixed ERM receivers with zero args.

scripting/lua/api/Registry.h

@@ -0,0 +1,110 @@
+/*
+ * Registry.h, part of VCMI engine
+ *
+ * Authors: listed in file AUTHORS in main folder
+ *
+ * License: GNU General Public License v2.0 or later
+ * Full text of license available in license.txt file, in main folder
+ *
+ */
+
+#pragma once
+
+#include <typeinfo>
+#include <typeindex>
+
+#define VCMI_REGISTER_SCRIPT_API(Type, Name) \
+namespace\
+{\
+RegisterAPI<Type> _register ## Type (Name);\
+}\
+\
+
+#define VCMI_REGISTER_CORE_SCRIPT_API(Type, Name) \
+namespace\
+{\
+RegisterCoreAPI<Type> _register ## Type (Name);\
+}\
+\
+
+namespace scripting
+{
+namespace api
+{
+class TypeRegistry;
+
+class Registar
+{
+public:
+	virtual ~Registar() = default;
+
+	virtual void pushMetatable(lua_State * L) const = 0;
+};
+
+class Registry : public boost::noncopyable
+{
+public:
+	using RegistryData = std::map<std::string, std::shared_ptr<Registar>>;
+	static Registry * get();
+
+	const Registar * find(const std::string & name) const;
+	void add(const std::string & name, std::shared_ptr<Registar> item);
+	void addCore(const std::string & name, std::shared_ptr<Registar> item);
+
+	const RegistryData & getCoreData() const
+	{
+		return coreData;
+	}
+private:
+	RegistryData data;
+	RegistryData coreData;
+
+	Registry();
+};
+
+template<typename T>
+class RegisterAPI
+{
+public:
+	RegisterAPI(const std::string & name)
+	{
+		auto r = std::make_shared<T>();
+		Registry::get()->add(name, r);
+	}
+};
+
+template<typename T>
+class RegisterCoreAPI
+{
+public:
+	RegisterCoreAPI(const std::string & name)
+	{
+		auto r = std::make_shared<T>();
+		Registry::get()->addCore(name, r);
+	}
+};
+
+class TypeRegistry : public boost::noncopyable
+{
+public:
+	template<typename T>
+	const char * getKey()
+	{
+		return getKeyForType(typeid(T));
+	}
+
+	static TypeRegistry * get();
+private:
+	size_t nextIndex;
+
+	boost::mutex mutex;
+
+	std::map<std::type_index, std::string> keys;
+
+	TypeRegistry();
+
+	const char * getKeyForType(const std::type_info & type);
+};
+
+}
+}