Exported GetSeed to lua and added file extension opendb to .gitignore.

.gitignore

@@ -88,6 +88,7 @@ src/AllFiles.lst
 *.opensdf
 *.sdf
 *.sln
+*.opendb
 *.idb
 
 # cmake output folders

Server/Plugins/APIDump/APIDesc.lua

@@ -2507,6 +2507,7 @@ end
 				GetName = { Params = "", Return = "string", Notes = "Returns the name of the world, as specified in the settings.ini file." },
 				GetNumChunks = { Params = "", Return = "number", Notes = "Returns the number of chunks currently loaded." },
 				GetScoreBoard = { Params = "", Return = "{{cScoreBoard}}", Notes = "Returns the {{cScoreBoard|ScoreBoard}} object used by this world. " },
+				GetSeed = { Params = "", Return = "number", Notes = "Returns the seed of the world." },
 				GetSignLines = { Params = "BlockX, BlockY, BlockZ", Return = "IsValid, [Line1, Line2, Line3, Line4]", Notes = "Returns true and the lines of a sign at the specified coords, or false if there is no sign at the coords." },
 				GetSpawnX = { Params = "", Return = "number", Notes = "Returns the X coord of the default spawn" },
 				GetSpawnY = { Params = "", Return = "number", Notes = "Returns the Y coord of the default spawn" },

src/World.h

@@ -757,6 +757,9 @@ public:
 		return (IsWeatherWet() && !IsBiomeNoDownfall(GetBiomeAt(a_BlockX, a_BlockZ)));
 	}
 
+	/** Returns the seed of the world. */
+	int GetSeed(void) { return m_Generator.GetSeed(); }
+
 	// tolua_end
 
 	cChunkGenerator & GetGenerator(void) { return m_Generator; }