Default gemfile in bundle :install
Implement match expectation
Default gem dependencies file written
in_app_root defines a special sandbox
Fix include expectation
Capture IO from gemdeps installation

This is not useful for passing a spec but it does hide a warning
Copy errors into $stdout

Bundler seems to output to $stdout all the time so copy this behavior.
It gives is a few passes and increases the usefulness of some failures
where the output is different.
Add rails to the default gems
Add a current-version bundler to the default gems