ActiveConfig should integrate with OptionParser

[alexg0]

It would be useful, particularly with CLI application to use ActiveConfig in combination with parsing command line options. It would be nice for ActiveConfig to allow overriding specific config setting through commandline options.

I would expect ActiveConfig to pluck those options out of ARGV, in accordance with configuration, at the time ActiveConfig object is created, while allowing application to handle rest of the options.

options from comand

[jlawler]

Can you give me an example of syntax? I'm not 100% sure I know what you're saying.