Top-level routines moved from Fit/Suite to Core/Fitting.
Some base classes and utilities moved from Core to Fit/Utils. This requires more thought.

a parameter is more than its value. A parameter has at least a name, a
physical dimension, and a value. So, our class is not ParameterWrapper,
but a ParameterValueWrapper, or a Parameter for short.)

renamed FitSuiteParameters::getParameter -> getFitParameter, to distinguish from ParameterPool::getParameter

Raise runtime error ("BUG") if IParameterized::IParameterized(const IParameterized& other) is called with non-empty parameter pool.
Just to prevent future abuses.

renamed MinimizerTest -> TrivialMinimizer (it's not a minimizer test, but a test minimizer, and a particularly trivial one);
renamed MinimizerScan -> ScanningMinimizer (it does not scan minimizers, but minimizes by scanning)

Since RealParameterWrapper now knows its name, ParameterPool needs no longer to use a map: converted to vector, just for conciseness.

This resolves #1513.

Merge branch 'testing' into develop: simplifications and code copy editing around parameterization (preparations for #1534).

no need for "AlgorithmType" in each variable name, as all these variables sit in namespace AlgorithmTypes

new file Fit/FitKernel/AlgorithmNames.h so that Fit no longer depends on Core/Basics/BornAgainNamespace.h

Basics mainly contains base classes; Tools contains utilities that are definitely not meant for inheritance