Represent cItem::m_Lore as an AStringVector (#3882)

* Replace cItem::m_Lore with AStringVector

* Reword deprecation warning

* Fix lua bindings

src/StringUtils.h

@@ -47,6 +47,9 @@ Resolves issue #490
 Return the splitted strings as a stringvector. */
 extern AStringVector StringSplitWithQuotes(const AString & str, const AString & delim);
 
+/** Join a list of strings with the given delimiter between entries. */
+AString StringJoin(const AStringVector & a_Strings, const AString & a_Delimiter);
+
 /** Split the string at any of the listed delimiters and trim each value.
 Returns the splitted strings as a stringvector. */
 extern AStringVector StringSplitAndTrim(const AString & str, const AString & delim);