Made some thing really deprecated, instead of only commented
- Added VTK_DEPRECATED macro, which can be used to deprecated a class. Used it to deprecate vtkExtractArraysOverTime and vtkPExtractArraysOverTime. Unwrapped their New method from VTK_LEGACY, since the vtkTypeMacro in the line after invokes New (causing a warning of the use of a deprecated method).
- Deprecated vtkTimerLog::AllocateLog and replaced remaining uses of it
- Wrap vtkContourGrid::ComputeGradients in VTK_LEGACY_REMOVE
- Added a macro to decorate printf-style functions, like vtkTimerLog::FormatAndMarkEvent