[TxMt] Updating the readme of RSpec.tmbundle

[Stefan Daschek]

I’m currently updating the RSpec bundle’s readme. The most important 
(and also most complicated) part deals with how to run RSpec examples 
from TextMate using the correct versions of Ruby and RSpec.

I’d love to get feedback on this. Here is the current version (work in 
progress, the relevant section is the one titled “Supports RSpec 1, 2 
and 3“):
https://github.com/rspec/rspec-tmbundle/blob/update-readme/README.md

(Topics like “How do I get TextMate to use rbenv for running my Ruby 
scripts” have popped up several times on this list, so this may be 
interesting even for people not using RSpec.)

Feel free to add any suggestions or corrections to the pull request at 
https://github.com/rspec/rspec-tmbundle/pull/80

Thanks!


Stefan