Making wavelet bounds more conspicuous

[spluque]

This is rather a wish than an issue. Could the lower_bound and upper_bound attributes for ContinuousWavelet be more conspicuously specified and available? The __init__ method does not provide a way to specify them, so the default (-8, 8) is used. The default is not even shown when printing the object, nor are they presented in the docstring. The only mention seems to be here.. It would be great to provide the bounds when instantiating and show them when printing the object. Thank you