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.

lib/vstd/StringUtils.cpp

@@ -11,4 +11,22 @@ namespace vstd
 		return result;
 	}
 
+	DLL_LINKAGE std::pair<std::string, std::string> splitStringToPair(std::string input, char separator)
+	{
+		std::pair<std::string, std::string> ret;
+		size_t splitPos = input.find(separator);
+
+		if (splitPos == std::string::npos)
+		{
+			ret.first.clear();
+			ret.second = input;
+		}
+		else
+		{
+			ret.first = input.substr(0, splitPos);
+			ret.second = input.substr(splitPos + 1);
+		}
+		return ret;
+	}
+
 }