Update tut_intro.md - made changes to introduction tutorial docs.

Update tut_spec.md - made changes to spectrometer tutorial documentation

Update tut_hmc.md - made changes to SKARAB HMC tutorial docs.

Update tut_40gbe.md - made changes to 40GbE SKARAB tutorial documentation.

Update tut_intro.md - made changes to introduction tutorial.

Move py files to new directory structure.

Links were to old ise/vivado directory paths which no longer exist

Somehow this fell through the cracks

Tutorial updates

Workshop2019

Fixed Red Pitaya Spectrometer Tutorial

The Red Pitaya Spectrometer tutorial did not run with the generated slx and fpg file. This has been fixed. The documentation has also been updated/corrected to make it easier for the user to follow.

- re-worked the tutorial to modify an existing yellow block as new_yellow_block has been removed
- changed the order of the mask initialisation so that parameters are added first and the mask script called second (previous instruction order resulted in an error)
- added images of interim steps for more clarity
- added information on YAML files and using the tutorial for other CASPER supported boards

- changed the order of the mask initialisation so that parameters are added first and the mask script called second (previous instruction order resulted in an error)
- added images of interim steps for more clarity
- added information on YAML files and using the tutorial for other CASPER supported boards

The files were created based on the old ise/vivado
segregated platform layout.

This moves them in line with the 2019+ layout

Workshop2019

Took workshop2019 versions where conflicts existed

 Conflicts:
	casperfpga
	docs/tutorials/snap/tut_spec.md
	vivado/mlib_devel
	workshop_setup.md