I apologize in advance for the number of posts about the same subject but I made a slight progress (well hopefully).
I used the following command (again found on the same page in the wiki and now it goes beyond boost)
BOOST_ROOT=/usr/local/include/boost-1_39 cmake ../lux-e7a5af3157c6/
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Building for target i486-linux-gnu
-- Looking for XOpenDisplay in /usr/lib/libX11.so;/usr/lib/libXext.so
-- Looking for XOpenDisplay in /usr/lib/libX11.so;/usr/lib/libXext.so - found
-- Looking for gethostbyname
-- Looking for gethostbyname - found
-- Looking for connect
-- Looking for connect - found
-- Looking for remove
-- Looking for remove - found
-- Looking for shmat
-- Looking for shmat - found
-- Looking for IceConnectionNumber in ICE
-- Looking for IceConnectionNumber in ICE - found
-- Found X11: /usr/lib/libX11.so
-- OpenGL include directory: /usr/include
-- Boost version: 1.39.0
-- Found the following Boost libraries:
-- thread
-- program_options
-- filesystem
-- serialization
-- iostreams
-- regex
-- system
-- Boost library directory: /lib
-- Boost include directory: /usr/local/include/boost-1_39
-- Found ZLIB: /usr/lib/libz.so
-- Found PNG: /usr/lib/libpng.so
-- Found TIFF: /usr/lib/libtiff.so
-- Found TIFF: /usr/lib/libtiff.so
-- Found JPEG: /usr/lib/libjpeg.so
-- JPEG include directory: /usr/include
-- Found wxWidgets: TRUE
-- wxWidgets include directory: /usr/lib/wx/include/gtk2-unicode-release-2.8/usr/include/wx-2.8
-- Looking for include files CMAKE_HAVE_PTHREAD_H
-- Looking for include files CMAKE_HAVE_PTHREAD_H - found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Warning : could not find Qt - not building Qt GUI
CMake Error at CMakeLists.txt:858 (INSTALL):
install TARGETS given target "luxrenderqt" which does not exist in this
directory.
Now it seems to require luxrenderqt which seems to be satisfied after
sudo apt-get install libqt4-dev
which I just guessed because it was not in the prerequisites-list in the wiki

Now this step was successfull and I was able to start the make-process (which has gone past the 'scanning for dependencies of target lux' without errors, so I am quite confident).
I will update this post, in case the 'make' was successful and otherwise post the next problem I encounter
Thank you very much for your help, it IS greatly appreciated and motivated me to keep trying!
Edit:
Seems to have worked

I can start the luxrender GUI in all its glory! Thanks...