- modify ncmenu constructor Accept &mut[] instead of Vec<> to avoid FFI related problems. Furthermore, from rust 1.48 it's easy to convert a Vec into an array using the std::convert::TryInto trait.
- fix ncmenu method names.
- fix & refactor Notcurses contructors; add `with_debug` constructor.
- make NcPlane.set_base receive a char instead of a reference, since it's copy.
- add `rre` cargo alias for running examples on release.
