added lua autoCompletion

added lua autoCompletion from http://ageekandhisblog.com/notepad-plugin-lua-corona-api-autocompletion/
as the one mentioned under http://docs.notepad-plus-plus.org/index.php?title=User_Defined_Language_Files#L -> http://www.davidcarrigg.com/uploads/LuaLangFile.zip is no longer available

Close #4978

PowerEditor/installer/nsisInclude/autoCompletion.nsh

@@ -143,6 +143,11 @@ SectionGroup "Auto-completion Files" autoCompletionComponent
 		SetOutPath "$INSTDIR\plugins\APIs"
 		File ".\APIs\baanc.xml"
 	${MementoSectionEnd}
+
+	${MementoSection} "Lua" Lua
+		SetOutPath "$INSTDIR\plugins\APIs"
+		File ".\APIs\lua.xml"
+	${MementoSectionEnd}
 SectionGroupEnd
 
 
@@ -239,5 +244,9 @@ SectionGroup un.autoCompletionComponent
 	Section un.BaanC
 		Delete "$INSTDIR\plugins\APIs\baanc.xml"
 	SectionEnd
-	
+
+		Section un.Lua
+		Delete "$INSTDIR\plugins\APIs\lua.xml"
+	SectionEnd
+
 SectionGroupEnd