Commit Briefs
free page contents on do_load_link
to do that, move empty_vlist to wrap.c and provide a similar function for struct line*s.
big refactor: introduce the window abstraction
- commands now take a struct window* instead of a raw tab - the struct ui_state is gone - using a window for the minibuffer too helps avoid code duplication - it will let us having more than one window on a tab! :DD It doesn't seem to have broken anything...
fix various warnings, no functional changes
now that we have a bounch of -Wxxx flags during compilation, let's fix everything.