Fix warnings on deployment

[abepetrillo]

WARNING:  licenses is empty, but is recommended.  Use a license abbreviation from:
http://opensource.org/licenses/alphabetical
WARNING:  description and summary are identical
WARNING:  open-ended dependency on capybara (>= 2.1.0) is not recommended
  if capybara is semantically versioned, use:
    add_runtime_dependency 'capybara', '~> 2.1', '>= 2.1.0'
WARNING:  open-ended dependency on launchy (>= 0) is not recommended
  if launchy is semantically versioned, use:
    add_runtime_dependency 'launchy', '~> 0'
WARNING:  open-ended dependency on json_pure (>= 0) is not recommended
  if json_pure is semantically versioned, use:
    add_runtime_dependency 'json_pure', '~> 0'
WARNING:  open-ended dependency on coffee-script (>= 0) is not recommended
  if coffee-script is semantically versioned, use:
    add_runtime_dependency 'coffee-script', '~> 0'
WARNING:  open-ended dependency on rspec-its (>= 0, development) is not recommended
  if rspec-its is semantically versioned, use:
    add_development_dependency 'rspec-its', '~> 0'
WARNING:  open-ended dependency on capybara-webkit (>= 0, development) is not recommended
  if capybara-webkit is semantically versioned, use:
    add_development_dependency 'capybara-webkit', '~> 0'
WARNING:  open-ended dependency on rake (>= 0, development) is not recommended
  if rake is semantically versioned, use:
    add_development_dependency 'rake', '~> 0'
WARNING:  open-ended dependency on coveralls (>= 0, development) is not recommended
  if coveralls is semantically versioned, use:
    add_development_dependency 'coveralls', '~> 0'
WARNING:  See http://guides.rubygems.org/specification-reference/ for help
  Successfully built RubyGem
  Name: evergreen
  Version: 1.1.3
  File: evergreen-1.1.3.gem

The above output is given on a release, need to fix up our dependencies.