Add new lua function to the docs.

Docs/Luadoc/Lua.xml

@@ -1237,6 +1237,7 @@
 		</Class>
 		<Class name='Steps'>
 			<Function name='GetDescription'/>
+			<Function name='GetAuthorCredit'/>
 			<Function name='GetDifficulty'/>
 			<Function name='GetFilename'/>
 			<Function name='GetHash'/>

Docs/Luadoc/LuaDocumentation.xml

@@ -3033,6 +3033,9 @@
 	<Function name='GetDescription' return='string' arguments=''>
 		Returns the Steps description.
 	</Function>
+	<Function name='GetAuthorCredit' return='string' arguments=''>
+		Returns the author that made that particular Steps pattern.
+	</Function>
 	<Function name='GetDifficulty' return='Difficulty' arguments=''>
 		Returns the Steps difficulty.
 	</Function>