[enh] first (not so good) step to introduce a new type in rendering_order_dict 'string'
[mod] rename complex_operator to comparison_operator
[mod] uniformise comparison node to have a key for the operator
[mod] remove a now unused horror in the validation function
[mod] new node: def_argument_tuple
[enh] remove the last of the horrible hack due to FST incoherence
[mod] remove hack due to the absence of string type
[mod] remove useless import
[mod] remove dirty replaces
[fix] move dumper to new string type
[mod] remove trailing spaces
[mod] always inherit from object
[fix] finish fixing tests
[mod] remove useless comments
[doc] fix list syntaxe
[doc] update definitions to match the new keys type in the nodes_rendering_order
[doc] update walkthrough
[doc] update RenderWalker example
[fix] include CHANGELOG in manifest.in
[enh] bugfix release 0.3.1