Improving setup procedure, now catching failed call to VAMatlab due to missing DLLs and notifying user in version line edit of GUI

 please verify if .pfp fix is supported on older Matlab versions

Sorry, but that did actually bug me for the longest time....

Little typo fixes. Also adding itaVA_experimental_gui, a GUI to quickly test filters using the experimental VA configuration.

Updated itaHRTF tutorial

also added logo to tutorial scripts for nice HTML files of the tutorials

Replaced the vastly outdated getting started pdf with a modified version of the former readme.txt.
All other instructions should be handled in the tutorials.