New structure proposal
statismo_ITK/* -> modules/core/ITK/include/*
move files around based on clangguth' comments

* modules/core/common -> modules/core
* modules/core/ITK -> modules/ITK
* modules/representers/common -> modules/core
* modules/representers/ITK -> modules/ITK
* modules/representers/VTK -> modules/VTK
Starts moving examples and tests
Starts moving Wrapping files
fix wrapping files location
add library statismo-core and related test
add library statismo-VTK
fix compilation for modules/VTK
fix compilation for modules/ITK
Remove unecessary files
relocate python tests into modules/VTK/wrapping/tests
add StatismoHeaderTest
header test for ITK and VTK
35 -> 5
fix header test for Kernels.h, PCAModelBuilder.txx
fix ReducedVarianceModelBuilder.txx
fix some more HeaderTests
some more HeaderTest fixed
some more fixes