BF: require GLEW 1.9
Adjusted gbp.conf -- we are using debian branch now + no need to duplicate .dfsg suffix for upstream
Do not remove Linux/build directory since upstream keeps it in GIT, not worth dfsg-ing I guess
upload to experimental (due to glew 1.9 requirement)
build-depend on libxfixes-dev
Add pnet.mex* for matlab into -nonfree distribution
remove also update/setup/download scripts from Debian installation