Revert "remapped everything using §, it will be used for tmux"
turns out § cant be mapped in tmux

This reverts commit de3554d24fc9bd2b6958e6e77ccd49eadc1b83e5.
remap Unity to use the same leader key as everything else
added bindings for saving and closing buffers to reduce finger strain
added more mappings to the unity list
added a starter tmux conf