More meaningful error messages for Rakefile
More meaningful error messages for Rakefile

Signed-off-by: Ricardo Chimal, Jr. <d4e7430f1534a12df46cedd1ac369935436dbb94@heroku.com>
eric1234/taps,ricardochimal/taps,wijet/taps,benizi/taps,eric1234/taps,wijet/taps,benizi/taps