Add support for a config file

[noctivityinc]

This is a fantastic tool, but rather opinionated on the startup command.

It would be great if we could create a .rspec_n or the like and set our commands. For example, I find myself doing this:

rspec_n 10 --no-file -s --order defined -c 'rm -rf tmp && bundle exec rspec

if we had a .rspec_n config file, we could do things like:

--no_file
-s 
--order defined
-c 'rm -rf tmp && bundle exec rspec`

Or something like that.

[roberts1000]

Thank you for the feedback! I like the idea. I'll put something together once I have some bandwidth.

[joe-sharp]

This one should be an easy addition for me to add. In the mean time a good alias would certainly be a decent workaround.

[roberts1000]

Agreed.

[joe-sharp]

I have a WIP branch started for this issue. Hopefully will open a PR someday soon.

[dimitrypo]

@roberts1000, I've created a PR for this feature I badly need in production, so it's here - #92

Please take a look and let me know what do you think.