windows now deactivate views before closing, which means the browser saves folder toggle state on quit
enum to specify window forwarding behavior
fixed view priorities: browser sticks to left, console next, then editors
console only shows "kill" command help while the command is actually running
added a section to the help text describing the shell console
Line abstraction unnecessary; moving toward undoable document modifications
no need to use unique_ptr now that Line just wraps std::string
split the editor document's buffer off into its own class
Merge branch 'master' of https://github.com/marssaxman/lindi