Added mouse support. Constants not yet defined.
Added mouse support.
Update lib.rs

Enabled macro rules.
Update lib.rs

Changed oldmask in mousemask to Option<&mmask_t> to allow the user to pass None, in which case we pass a null pointer to ncurses.
Update lib.rs

Fixed mousemask.
Update lib.rs

Upgraded to latest rust.
Merge pull request #7 from phillipw/master

Added mouse support.