started to write tiff fixture to handle the test data provided by Stephan Preibisch
added fixtures and test suite for reading reference data from disk, reading all the input data is quite slow, so I had to go for a global variable solution that loads the data only once and then copy it around
started to implement one iteration of deconvolution on cpu, code is broken (does not compile)
implemented single-cpu deconvolution, tests run through (without checking any errors)
added class to abstract memory transfers onto device and back, tests for it added as well (adapted cmake accordingly)
* added cpu kernels for later optimisations
* created test stuite for developing deconvoution on the cpu (first)
* refactored tiff_fixture
** dropped setting the view as compile time paramter
** renamed all classes
** created class that loads all image stackes from disk
refactored tiff fixtures completely, cpu deconvolution is inplace but produces NAN during the computation of the integral