Interface changes.

Typing simply memo now displays notes (same as option -s). Option -s is
left in place if someone is using it. Reading stdin is now done using an
option -. Unfortunately this breaks the interface, but had to be done. -
is standard option for a program to read from stdin.

Signed-off-by: Niko Rosvall <niko@ideabyte.net>
Add -r option prototype. Clean up comments

Signed-off-by: Niko Rosvall <niko@ideabyte.net>
Add -r flag to allow user to replace notes.

Now with -r it's possible to replace note content or note date without
touching the id of the note.

Signed-off-by: Niko Rosvall <niko@ideabyte.net>
Memo is now able to add multiple notes at once.

Flag -i implements reading from stdin until the end of transmission
(^D). Data is splitted by \n and each line is assumed to be a note
which is added to the memo file.

Signed-off-by: Niko Rosvall <niko@ideabyte.net>
Version 1.4

Signed-off-by: Niko Rosvall <niko@ideabyte.net>
Update man page for version 1.4

Signed-off-by: Niko Rosvall <niko@ideabyte.net>