Merge branch 'mget' of https://github.com/def-/Nim into def--mget

Conflicts:
	lib/pure/collections/critbits.nim
	lib/pure/collections/tables.nim
	lib/pure/xmltree.nim
	lib/system/sets.nim
	tests/collections/ttables.nim
	tests/collections/ttablesref.nim

tests/collections/ttables.nim

@@ -60,8 +60,12 @@ block tableTest2:
   t["123"] = 1.5 # test overwriting
 
   assert t["123"] == 1.5
-  assert t["111"] == 0.0 # deleted
+  try:
+    echo t["111"] # deleted
+  except KeyError:
+    discard
   assert(not hasKey(t, "111"))
+
   assert "123" in t
   assert("111" notin t)