.gitignore: Ignore Nano backup files.
Added nanorc conf files as a quick reference. There is also some notes on and output of a package on github providing ready-made nano settings, especially regarding syntax highlighting and Windoze-y Keybindings. Also: Screenshot.
Minor changes in quad.py tree viewer, short note on 'set' use in bash notes file, important fact about the .nanorc file that the mentioned configs bundle generates.
Added some notes on line insertion using sed.