adding code images

docs.it4i/software/viz/insitu.md

docs.it4i/software/viz/insitu/CMakeLists.txt

docs.it4i/software/viz/insitu/FEDriver.cxx

docs.it4i/software/viz/insitu/img/Catalyst_connect.png

docs.it4i/software/viz/insitu/img/Data_shown.png

docs.it4i/software/viz/insitu/img/Extract_input.png

docs.it4i/software/viz/insitu/img/FEDriver.png

docs.it4i/software/viz/insitu/img/Finalize.png

docs.it4i/software/viz/insitu/img/Initialize.png

docs.it4i/software/viz/insitu/img/Input_pipeline.png

docs.it4i/software/viz/insitu/img/Result.png

docs.it4i/software/viz/insitu/img/Show_velocity.png

docs.it4i/software/viz/insitu/img/Simulator_response.png

docs.it4i/software/viz/insitu/img/feslicescript.png

docs.it4i/software/viz/insitu/insitu.tar.gz