FastVDMA tests

[kabrodzki]

1. Play with the fastVDMA test
2. Check out the DMATop.vcd waves in GTKWaves
3. Create our own tests(more images, different positions and configurations)
4. Describe results on our wiki

I have also created issue for @piotr-binkowski with request to update the documentation on CSR

[kgugala]

Please update the repository with any changes you introduce to the code