rename and,or,nor ->all,any,none in luafilters

these come closer to their actual meaning and also are not lua keywords
which might come in hand later, in particular we can now replace the
f_and, f_or,f_terrain, with f.all, f.any, f.terrain if we want.

data/multiplayer/scenarios/test_lua_mapgen.lua

@@ -11,23 +11,15 @@ local function f_terrain(terrain)
 end
 
 local function f_and(...)
-	return { "and",  ... }
-end
-
-local function f_nand(...)
-	return { "nand",  ... }
+	return { "all",  ... }
 end
 
 local function f_not(...)
-	return { "nand",  ... }
+	return { "none",  ... }
 end
 
 local function f_or(...)
-	return { "or",  ... }
-end
-
-local function f_nor(...)
-	return { "nor",  ... }
+	return { "any",  ... }
 end
 
 local function f_adjacent(f, ad, count)

src/scripting/lua_terrainfilter.cpp

@@ -638,10 +638,10 @@ enum filter_keys { F_AND, F_OR, F_NAND, F_NOR, F_X, F_Y, F_FIND_IN, F_ADJACENT,
 //todoc++14: std::unordered_map doesn'tsupport herterogrnous lookup.
 //todo consider renaming and -> all ,or ->any, nor -> none, nand -> notall
 static const std::unordered_map<std::string, filter_keys> keys {
-	{ "and", F_AND }, 
-	{ "or", F_OR }, 
-	{ "nand", F_NAND }, 
-	{ "or", F_NOR }, 
+	{ "all", F_AND }, 
+	{ "any", F_OR }, 
+	{ "not_all", F_NAND }, 
+	{ "none", F_NOR }, 
 	{ "x", F_X },
 	{ "y", F_Y },
 	{ "find_in", F_FIND_IN },