Separate out the configuration for linking against ncurses as has just be done
for extras/curs.
Update programming style.
extras/curses/Ncurses.options:
extras/curses/Mmakefile:
extras/curses/sample/Mmakefile:
Shift the flags for linking against ncurses to Ncurses.options.
Document how to use the ncursesN-config and pkg-config tools to find
the appropriate flags for a system.
extras/curses/mcurses.basics.m:
extras/curses/mcurses.user.m:
Update syntax and programming style.
Replace tabs with spaces and delete trailing whitespace.
extras/complex_numbers/*.m:
Rename files containing submodules so that we can (correctly) build
this library without first building a source file mapping.
extras/complex_numbers/samples/Mmakefile:
extras/complex_numbers/tests/Mmakefile:
Tell the C compiler where the header files for libcomplex_numbers
are.
extras/curs/samples/Mmakefile:
Pass the -I option to the C compiler via the CFLAGS variable, not
the MGNUCFLAGS variable; the latter just causes the mgnuc script
to halt option processing and construct an invalid command line
for the C compiler.
extras/curses/*.m:
Rename files containing submodules so that we can (correctly) build
this library without first building a source file mapping.
extras/curses/mcurses.m:
Style and formatting fixes.
extras/curses/sample/Mmakefile:
Pass the -I option to the C compiler via the CFLAGS variable.
