Merge remote-tracking branch 'upstream/master'. Add changelog.

# Conflicts:
#	redbaron/base_nodes.py

CHANGELOG

@@ -5,11 +5,11 @@ Changelog
 -----------------
 - fix help() after append
+- add at method
 0.6.2 (2016-10-03)
 ----------------
-- add at method
 - fix some old call to log() weren't lazy, that could cause a crash in some situations by an infinite recursive call and also reduce performances
 - fix in _iter_in_rendering_order method to avoid bug in edge cases (issue #107)