added node_modules/ to .gitignore
added build script
added deft to pull in dependencies (like bootstrap?)
updated CSS using Bootstrap (for now)
switched to Lumen theme
removing gitty.css from the repo
added support for directory as first command-line arg
switching to Angular (no refactoring yet)
started refactoring (Angular-ifying)

- added sections to index.html
- added NavController, which uses $rootScope
- updated MainController to use $scope
opening folders and files works again (kinda)
OK, file/folder navigation is working well
added highlighting of current section in nav
removed all hrefs
added directive to create CodeMirror editors
include js/*.js files in build