Add initial prototype.

.gitignore

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+## Gnat build artifacts
+#
+*.o
+*.ali
+*-loc.xml
+gnatinspect.db
+*~
+auto.cgpr
+*.stderr
+*.stdout
+*.a
+*.log
+.clang-format
+.clangd
+.#*
+*.deps
+*.d
+.travis.yml
+
+## Build folders
+#
+build
+**/dsa/x86_64-unknown-linux-gnu
+bin
+
+
+## Source
+#
+2-low/neural/source/attic
+2-low/neural/source/attic2
+2-low/neural/implement
+2-low/neural/applet/test/learn_linear/velocity.net
+
+3-mid/impact/contrib
+3-mid/physics/implement/impact/*
+3-mid/physics/implement/vox/*
+#3-mid/physics/implement/box2d/contrib
+
+4-high/gel/source/platform/sdl/attic
+
+
+
+## Assets
+#
+#**/assets/opengl
+#**/assets/gel
+**/assets/attic
+3-mid/opengl/applet/demo/models/render_hex_grid/document
+3-mid/opengl/applet/demo/models/render_hex_grid/assets
+
+
+## Binaries
+#
+box2d_HelloWorld
+launch_box_rig_1_bone_demo
+launch_diffuse_light
+launch_simple_instant_events_demo
+launch_simple_deferred_events_demo
+launch_simple_chat_client
+launch_simple_chat_registrar
+launch_outline
+launch_parse_box
+launch_learn_linear
+launch_pong
+launch_core_test
+launch_opengl_model
+launch_large_terrain_demo
+launch_math_testsuite
+launch_many_boxes_demo
+launch_model_scaling
+launch_modeller_test
+launch_mouse_selection
+launch_render_arrows
+launch_render_asteroids
+launch_render_billboards
+launch_render_boxes
+launch_render_screenshot
+launch_render_text
+launch_two_cameras_demo
+launch_egl_linkage_test
+generate_gl_types_spec
+launch_freetype_linkage_test
+launch_hello_physics_interface_2d_demo
+launch_hello_physics_interface_3d_demo
+launch_drop_ball_on_box
+launch_drop_box_on_box
+launch_gel_fused
+launch_hello_gel
+launch_human_rig_demo
+launch_chains_2d
+launch_hinged_box
+launch_human_model
+launch_human_model_v1
+launch_mixed_joints
+launch_mixed_joints_2d
+launch_mixed_shapes
+launch_text_sprite_demo
+launch_impact_hello_3d_demo
+launch_camera_demo
+launch_render_lighting
+launch_render_capsules
+launch_rig_demo
+launch_crunch
+launch_render_models
+launch_simple_animation
+launch_full_demo
+launch_hello_physics_interface_demo
+launch_test_engine
+launch_strings_demo
+launch_add_rid
+launch_add_rid_sprite_test
+launch_pong_tute
+build_all_lace
+
+test_environ_paths
+test_environ_compression
+test_text_replace
+test_environ_general
+HelloWorld*
+5-all/applet/build_all/build_all
+test_dice
+launch_hexagon_test
+launch_render_hex_grid
+
+
+## Old Code
+#
+*-old
+*-orig
+old-events
+
+
+## Misc
+#
+*.ogv
+*.project
+opengl-series
+attic
+coding_style.txt
+
+
+## Alire
+#
+obj/
+lib/
+alire/
+config/
+
+
+## Projects
+#
+2-low/neural/
+3-mid/impact/
+