Support global options about typin

[adambajguz]

@ikkentim this will be implemented for Typin 4.0 due to the redesign of the library that will finally make it fully extensible. Probably global options will be implemented as a 'plugin'. I hope you don't mind waiting for it :)

@supapo I've verified this, and in terms of latest Typin release (3.0.4), there is no such limitation. I think that actually never did such a limitation exist. Abstract command DO NOT need CommandAttribute. CommandAttribute or OptionAttrbute DO NOT check for CommandAttribute. The only limitation is that you cannot have a interface with properties marked with CommandAttribute or OptionAttrbute because those attributes won't be read by Typin.

[adambajguz]

I haven't tested this, but you can propably use abstract base class to achive sth similar.

[supapo]

The point is that the CommandOption attribute requires the class to have the Command attribute witch means that the abstract class must be an available command