Fixed:

  - mini_shoulda and color output not working anymore(find alternative)
  - monkey patch image_path for asset-pack/helper.rb which screws up
    the assetpack pipline
  - newer Padrino apps will use RAKE_ENV instead of PADRINO_ENV
Merge pull request #19 from Ortuna/TLC

Minor Bug fixes
- mini_shoulda and color output not working anymore(find alternative)
- monkey patch image_path for asset-pack/helper.rb which screws up the assetpack pipline
- newer Padrino apps will use RAKE_ENV instead of PADRINO_ENV