[enh] add CommaProxyList to GlobalNode.value
[enh] add CommaProxyList to ImportNode.value
[enh] add CommaProxyList to LambdaNode.arguments
[enh] add CommaProxyList to PrintNode.value
[enh] add CommaProxyList to ReprNode.value
[enh] add CommaProxyList to WithNode.contexts
[mod] update TODO
[fix] CommaProxyList.__setitem__ didn't synchronise with node_list
[fix] PrintNode code wasn't expecting proxy list
[fix] make sure that comma_proxy_list.pop can be called without a value
[mod] rename .index property to .index_on_parent
[doc] update CHANGELOG
[doc] update .index_on_parent in doc
[enh] start to forward getattr to proxy comma list
[enh] forward getitem from node to comma proxy list
[enh] ensure in forwarding that input is correctly parsed in context
[enh] test that .insert is forwarded
[enh] same for extend
[enh] same for pop
[enh] same for remove