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/mapObjects/CObjectHandler.cpp

@@ -139,6 +139,21 @@ CGObjectInstance::~CGObjectInstance()
 {
 }
 
+int32_t CGObjectInstance::getObjGroupIndex() const
+{
+	return ID.num;
+}
+
+int32_t CGObjectInstance::getObjTypeIndex() const
+{
+	return subID;
+}
+
+int3 CGObjectInstance::getPosition() const
+{
+	return pos;
+}
+
 void CGObjectInstance::setOwner(PlayerColor ow)
 {
 	tempOwner = ow;
@@ -346,6 +361,11 @@ bool CGObjectInstance::passableFor(PlayerColor color) const
 	return false;
 }
 
+void CGObjectInstance::updateFrom(const JsonNode & data)
+{
+
+}
+
 void CGObjectInstance::serializeJson(JsonSerializeFormat & handler)
 {
 	//only save here, loading is handled by map loader