add st2 sass plugin
selection filtering in st3
add fish shell plugin to st3
whitespace in st2 cfg
improved vim-style copy-paste in tmux

leader [ # enter copy mode
v        # enter visual select mode
hjkl     # (use vi nav commands to define selection boundaries)
y        # yank to clipboard
<enter>  # cancel, i think
...      # time passes
leader ] # paste
try fish as a default shell