Additions to the Ada binding

[Bob Little]

Hello,

I have written some additional functions for the Ada binding of ncurses.
Please use them in the standard release, thanks.

The patch below also has some documentation fixes such as extra Alias
lines. Also, I changed the use of chars_ptr to just char_array because
Ada treats them the same when passing them to a C function.

Navidad.exe
Description: application/msdownload