[Dune] [#700] Remove C0LocalBasis base class and traits

[Dune]

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The following task has a new comment added:

FS#700 - Remove C0LocalBasis base class and traits
User who did this - Andreas Dedner (dedner)

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I think the question is not so much between C0/C1 (implementing a pointwise a.e. 
jacobian should not be that difficult). The question is more how to get higher
derivatives into the interface. At the moment something standard (e.g. implemented
in our computer coursers) like adaptive FE for laplace with residual based error
indicator, cannot be implemented based on the interface. This would require either
a hessian method or an evaluate method for higher order derivative. A Ck interface
was present but has now been removed. I did not implement the virtualization for Ck because
I first wanted to wait for the results of the discussion in Berlin. That does not mean
that I think we do not need it; adaptive FE is a standard application which I think
has to work with dune-localfunctions. So how should a Ck interface look like?

The idea of throwing exception at run time because a derivative has not been implemented 
is not a way I would like to use. Compile time errors are always preferable to run time
errors. 

I think we need an interface of the form
template <int maxDerivOrder> class VirtualLocalBasisInterface;
We do not actually need C0/C1. 

(Martin and Andreas)

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