use non-deprecated bundler api
Updates to rake 10
Replace the rubygems symbol with explicit https rubygems

This was causing an error when setting up the rspec-dev environment.
This surpresses the error.

Signed-off-by: Sam Phippen <samphippen@googlemail.com>
Merge pull request #36 from samphippen/use-https-rubygems

Replace the rubygems symbol with explicit https rubygems
reduce noise in rake-task output
rspec-rails itself will decide what the latest version of Rails is
rake git:co is aliased to git:checkout