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.cpp

@@ -0,0 +1,88 @@
+/*
+ * Registry.cpp, 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
+ *
+ */
+#include "StdInc.h"
+
+#include "api/Registry.h"
+
+namespace scripting
+{
+namespace api
+{
+
+Registry::Registry() = default;
+
+Registry * Registry::get()
+{
+	static std::unique_ptr<Registry> Instance = std::unique_ptr<Registry>(new Registry());
+	return Instance.get();
+}
+
+void Registry::add(const std::string & name, std::shared_ptr<Registar> item)
+{
+	data[name] = item;
+}
+
+void Registry::addCore(const std::string & name, std::shared_ptr<Registar> item)
+{
+	coreData[name] = item;
+}
+
+const Registar * Registry::find(const std::string & name) const
+{
+	auto iter = data.find(name);
+	if(iter == data.end())
+		return nullptr;
+	else
+		return iter->second.get();
+}
+
+TypeRegistry::TypeRegistry()
+	: nextIndex(0)
+{
+
+}
+
+TypeRegistry * TypeRegistry::get()
+{
+	static std::unique_ptr<TypeRegistry> Instance = std::unique_ptr<TypeRegistry>(new TypeRegistry());
+	return Instance.get();
+}
+
+const char * TypeRegistry::getKeyForType(const std::type_info & type)
+{
+	//std::type_index is unique and stable (because all bindings are in vcmiLua shared lib), but there is no way to convert it to Lua value
+	//there is no guarantee that name is unique, but it is at least somewhat human readable, so we append unique number to name
+	//TODO: name demangle
+
+	std::type_index typeIndex(type);
+
+	boost::unique_lock<boost::mutex> lock(mutex);
+
+	auto iter = keys.find(typeIndex);
+
+	if(iter == std::end(keys))
+	{
+		std::string newKey = type.name();
+		newKey += "_";
+		newKey += std::to_string(nextIndex++);
+
+		keys[typeIndex] = std::move(newKey);
+
+		return keys[typeIndex].c_str();
+	}
+	else
+	{
+		return iter->second.c_str();
+	}
+}
+
+
+}
+}