time measurement in t_dwt2
 Optimized stride.
Loop over num_threads.
Worked on DWT...
Cleaned up DWT.
Support non-square images.
Support different side lengthes.
 Support non square images.
 DWT ctor expecting two side lengths now.
Distinguish between 2D and 3D.
 Seperated 2D and 3D cases.
 Working 3D DWT implementation.
 Adjusted some detail of DWT.
 Bug in DWT (Adjoint).
 Added constructors for 2D case.
Merge branch 'master' of https://github.com/kvahed/codeare into merge_dwt3
 Changed place of function declaration in Wavelet.hpp.
Merge branch 'dwt3'