Allow specifying RSpec command line options

[Bryan Helmkamp]

Spin will ignore any arguments passed to spin serve that are not paths to files:

spin/bin/spin

Line 191 in 72fbfc6

 f = files_to_load.select { |f| File.exist?(f.split(':')[0].to_s) }.uniq.join(SEPARATOR) 

This is unfortunate, as it prevents passing RSpec options to spin serve. I propose spin support a way to send in ARGV options that get set as the ARGV in the forked process.

Maybe we could use this style:

spin push -- --color --profile --tag type:model

Thoughts?

[Jesse Storimer]

Makes sense to me. I like it.

[Anuj Dutta]

Is specifying rspec options in .rspec file and letting spin pick it up from there not the best option? or are you suggesting that spin should support both.

[Marek Rosa]

I've cleaned up the bits for test unit from PR #45 to support this syntax with Rspec as well.