added bgslibrary home page resources

docs/images/bgs-logo.png

docs/images/bgs.png

docs/images/bgs_giphy.gif

docs/images/bgs_giphy2.gif

docs/images/bgs_project_diagram_v2.png

docs/images/bgs_project_diagram_v5.png

docs/images/bgs_project_diagram_v6.png

docs/images/bgs_project_diagram_v7.png

docs/images/bgs_project_diagram_v8.png

docs/images/bgsbook.jpg

docs/images/bgslib_java_wrapper_screen.png

docs/images/bgslib_macosx.png

docs/images/bgslib_macosx2.png

docs/images/bgslib_qtgui_macosx.png

docs/images/bgslibrary2_matlab.png

docs/images/bgslibrary2_matlab_mac.png

docs/images/bgslibrary2_qt_gui_osx.png

docs/images/bgslibrary_arch.png

docs/images/bgslibrary_benchmark.png

docs/images/bgslibrary_gui_screen01.png