Slambased agents (#39)

baselines/agents/slam_agents.py

baselines/config/default.py

baselines/slambased/README.md

baselines/slambased/data/mp3d3_small1k.yaml

baselines/slambased/data/slam-based-agent.png

baselines/slambased/install_deps.sh

baselines/slambased/mappers.py

baselines/slambased/monodepth.py

baselines/slambased/path_planners.py

baselines/slambased/reprojection.py

baselines/slambased/utils.py

configs/tasks/pointnav_rgbd.yaml