Create new wrapping types that can safely encapsulate the mutable references,
and implement Drop and automatic (de)referencing.
- Notcurses
- rename Notcurses* to NcNotcurses*.
- rename NotcursesOptions to NcNotcursesOptions.
- new Notcurses struct.
- implement Drop, AsRef, AsMut, Deref & DerefMut.
- override stop method to be no-op.
- reimplement constructors and associated methods.
- remove without_altscreen_with_banners constructor.
- update examples and tests.
- rustfmt.
- add NcMenuSection::new_separator() constructor.
- rename constructor method for an empty NcInput to new();
- fix notcurses_getc_blocking() function name and error logic.
- improve comments.
- change type of NCMENU_OPTION_* to u64 (like in C API)
- fix error_str![] macro.
- improve error messages.
- 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.
