Integrate Ceres with the native interpreter and extend features

[bburlacu]

We can use Eigen/Ceres inside the native interpreter and be able to:

• use Eigen for evaluation
• optimize model coefficients using nonlinear least squares
• pass solver options to Ceres
• get a report from the solver (successful steps, error, etc)

[bburlacu]

r17844: Implement NativeInterpreter and ParameterOptimizer classes. The ParameterOptimizer offers an interface to Ceres and its options and to the variable projection optimization method. Added unit tests.

[bburlacu]

r17853: Add accidentally omitted files.

[gkronber]

r17989 updated native dlls for NativeInterpreter to a version that runs on Hive infrastructure. Some smaller changes because of deviations in the independently developed implementations (in particular enum types).

I have not tested this version for a few months.

[gkronber]

TODO: the SymbolicDataAnalysisExpressionTreeNativeInterpreter can be deleted (replaced by NativeInterpreter) but first the inconsistencies between the two interpreters should be checked.

[gkronber]

r17991 changed files in this branch. Need to fix.

[gkronber]

r17996: reverse merge of changes from 17991 in the ceres branch.

[gkronber]

r18006: merged r17784:18004 from trunk to branch to prepare for trunk reintegration (fixed a conflict in CrossValidation.cs)

[bburlacu]

r18009: Refactor ConstantOptimizationEvaluator to use the natice ParameterOptimizer

r18010: fix typo bug

[bburlacu]

r18011: Implement Ceres-based parameter optimizer in new evaluator. Revert constant optimization evaluator to old behavior.

[gkronber]

Include r17831 from #3100.