bundle update slim-rails
Fix rails version spec ~> 4.1.0
bundle update coffee-rails rails
activerecord-4.1.0 requires mysql2 (~> 0.3.13)
`bundle update rspec-rails  guard-rspec` to fix minitest bug
bundle update bullet

Update it to fix this https://github.com/seattlerb/minitest/issues/286
Make bootstrap_flash helper work with rails 4.1.0