cleanup

utils/api_demos/CMakeLists.txt

utils/api_demos/mainAntTweakBar.cpp

utils/api_demos/mainCartesian.cpp

utils/api_demos/mainElasticity.cpp

utils/api_demos/mainGlut.cpp

utils/api_demos/mainHomology.cpp

utils/api_demos/mainPost.cpp

utils/api_demos/mainReadMesh.cpp

utils/api_demos/mainRemesh.cpp

utils/api_demos/mainVertexArray.cpp

utils/api_demos/simpleBeam.dat

utils/api_demos/simpleBeam.geo

utils/api_demos/t0.cpp