v1.1.0

Add tmux support and support for in-terminal plotting when using iTerm2 + tmux

• Now possible to specify g:jukit_terminal = 'tmux'
• If g:jukit_terminal = 'tmux' and g:jukit_inline_plotting = 1, then it is assumed iTerm2 terminal is used and python-imgcat is automatically specified as matplotlib backend to display matplotlib plots within iTerm2
• Minor changes to default global variable values (see README.md for current default values)