Import vectorwrapper, it's just too convenient. It's only used in one place for now but I will probably use it more from now on.
Nana needs to be present as a dependency on the system now. You can use meson setup -Dnanaincl=path -Dnanaroot=path ~/memoserv to specify non-standard include and library locations for nana.
Savegame icons are displayed on the window.
