Add StrategyDict.__delattr__ behavior
Add MultiKeyDict key2keys and value2keys methods
MultiKeyDict keytuples keep the insertion order
New "keep_name" kwarg for StrategyDict.strategy
StrategyDict docstrings update + strategy doctest
Bad StrategyDict.strategy kwarg changes nothing
StrategyDict attribute replace and non-strategies
StrategyDict default strategy removing/replacing
StrategyDict strategy w/ setitem; CHANGES.rst upd
StrategyDict reusing strategy name + default upd