introduce SNOTES_OPTION_CHAR='!'
introduce SNOTES_OPTION_CHAR='!'

Ok, ' ' restricts the user, '/' collides with standard unix path semantics...
I hereby change it to '!' and turn it into a configuration variable.

Might be overkill, but as I've changed it twice already and
it occurs in more than one line in the source, it makes sense.

v4hn/snotes