I did the installation via https://github.com/zendesk/samson

return

$ script/bootstrap

Using rake 10.4.2
Using i18n 0.7.0
Using multijson 1.11.0
Using activesupport 3.2.21
Using builder 3.0.4
Using activemodel 3.2.21
Using erubis 2.7.0
Using journey 1.0.4
Using rack 1.4.5
Using rack-cache 1.2
Using rack-test 0.6.3
Using hike 1.2.3
Using tilt 1.4.1
Using sprockets 2.2.3
Using actionpack 3.2.21
Using mime-types 1.25.1
Using polyglot 0.3.5
Using treetop 1.4.15
Using mail 2.5.4
Using actionmailer 3.2.21
Using arel 3.0.3
Using tzinfo 0.3.44
Using activerecord 3.2.21
Using activeresource 3.2.21
Using addressable 2.3.8
Using airbrake 4.2.1
Using ansible 0.2.0
Using columnize 0.9.0
Using byebug 5.0.0
Using highline 1.7.2
Using net-ssh 2.9.2
Using net-scp 1.2.1
Using net-sftp 2.1.2
Using net-ssh-gateway 1.2.0
Using capistrano 2.15.5
Using capistranocolors 0.5.5
Using capistranorsyncwithremotecache 2.4.0
Using hitimes 1.2.2
Using timers 4.0.1
Using celluloid 0.16.0
Using chronic 0.10.2
Using coderay 1.1.0
Using coffee-script-source 1.9.1.1
Using execjs 2.5.2
Using coffee-script 2.4.1
Using rack-ssl 1.3.4
Using json 1.8.3
Using rdoc 3.12.2
Using thor 0.19.1
Using railties 3.2.21
Using coffee-rails 3.2.2
Using connectionpool 2.2.0
Using safeyaml 1.0.4
Using crack 0.4.2
Using daemons 1.2.2
Using databasecleaner 1.4.1
Using delayedjob 4.0.6
Using diff-lcs 1.2.5
Using dotiw 3.0.1
Using eventmachine 1.0.7
Using factorygirl 4.5.0
Using factorygirlrails 4.5.0
Using fakefs 0.6.7
Using multipart-post 2.0.0
Using faraday 0.9.1
Using faraday-stack 0.1.3
Using faradaymiddleware 0.9.1
Using ffaker 2.0.0
Using ffi 1.9.8
Using formatador 0.2.5
Using posix-spawn 0.3.11
Using grit 2.5.0
Using rb-fsevent 0.9.5
Using rb-inotify 0.9.5
Using listen 2.10.0
Using lumberjack 1.0.9
Using nenv 0.2.0
Using shellany 0.0.1
Using notiffany 0.0.6
Using methodsource 0.8.2
Using slop 3.6.0
Using pry 0.10.1
Using guard 2.12.6
Using bundler 1.10.3
Using guard-compat 1.2.1
Using guard-bundler 2.1.0
Using rspec-support 3.2.2
Using rspec-core 3.2.3
Using rspec-expectations 3.2.1
Using rspec-mocks 3.2.1
Using rspec 3.2.0
Using guard-rspec 4.5.2
Using hasscope 0.6.0
Using hashie 3.4.2
Using responders 1.1.2
Using inheritedresources 1.6.0
Using jquery-rails 3.1.2
Using jwt 1.5.0
Using kaminari 0.16.3
Using marked 1.2.2
Using multixml 0.5.5
Using mysql2 0.3.18
Using newrelicrpm 3.12.0.288
Using oauth2 1.0.0
Using omniauth 1.2.2
Using omniauth-oauth2 1.3.0
Using omniauth-github 1.1.2
Using open4 1.3.4
Using permanentrecords 3.3.0
Using rack-protection 1.5.3
Using rails 3.2.21
Using redis 3.2.1
Using redis-namespace 1.5.2
Using rspec-rails 3.2.3
Using sass 3.4.14
Using sass-rails 3.2.6
Using shoulda-matchers 2.8.0
Using sidekiq 3.3.4
Using simpleform 2.1.2
Using sinatra 1.4.6
Using temple 0.7.6
Using slim 3.0.6
Using sqlite3 1.3.10
Using thin 1.6.3
Using twitter-bootstrap-rails 2.2.8
Using uglifier 2.7.1
Using vcr 2.9.3
Using webmock 1.21.0
Using whenever 0.9.4
Using yajl-ruby 1.2.1
Bundle complete! 44 Gemfile dependencies, 130 gems now installed.
Use bundle show [gemname] to see where a bundled gem is installed.
stranodevelopment already exists
stranotest already exists
rake aborted!
NameError: uninitialized constant Faker
/var/www/strano/spec/factories.rb:4:in block (2 levels) in <top (required)>'
/var/lib/gems/2.1.0/gems/factorygirl-4.5.0/lib/factorygirl/syntax/default.rb:18:ininstanceeval'
/var/lib/gems/2.1.0/gems/factorygirl-4.5.0/lib/factorygirl/syntax/default.rb:18:in factory'
/var/www/strano/spec/factories.rb:3:inblock in <top (required)>'
/var/lib/gems/2.1.0/gems/factorygirl-4.5.0/lib/factorygirl/syntax/default.rb:49:in instanceeval'
/var/lib/gems/2.1.0/gems/factorygirl-4.5.0/lib/factorygirl/syntax/default.rb:49:inrun'
/var/lib/gems/2.1.0/gems/factorygirl-4.5.0/lib/factorygirl/syntax/default.rb:7:in define'
/var/www/strano/spec/factories.rb:1:in<top (required)>'
/var/lib/gems/2.1.0/gems/factorygirl-4.5.0/lib/factorygirl/finddefinitions.rb:16:in block in finddefinitions'
/var/lib/gems/2.1.0/gems/factorygirl-4.5.0/lib/factorygirl/finddefinitions.rb:15:ineach'
/var/lib/gems/2.1.0/gems/factorygirl-4.5.0/lib/factorygirl/finddefinitions.rb:15:in finddefinitions'
/var/lib/gems/2.1.0/gems/factorygirlrails-4.5.0/lib/factorygirlrails/railtie.rb:21:inblock in <class:Railtie>'
/var/lib/gems/2.1.0/gems/activesupport-3.2.21/lib/activesupport/lazyloadhooks.rb:34:in call'
/var/lib/gems/2.1.0/gems/activesupport-3.2.21/lib/activesupport/lazyloadhooks.rb:34:in execute_hook'
/var/lib/gems/2.1.0/gems/activesupport-3.2.21/lib/active_support/lazy_load_hooks.rb:43:inblock in runloadhooks'
/var/lib/gems/2.1.0/gems/activesupport-3.2.21/lib/activesupport/lazyloadhooks.rb:42:ineach'
/var/lib/gems/2.1.0/gems/activesupport-3.2.21/lib/activesupport/lazyloadhooks.rb:42:in runloadhooks'
/var/lib/gems/2.1.0/gems/railties-3.2.21/lib/rails/application/finisher.rb:59:inblock in <module:Finisher>'
/var/lib/gems/2.1.0/gems/railties-3.2.21/lib/rails/initializable.rb:30:in instanceexec'
/var/lib/gems/2.1.0/gems/railties-3.2.21/lib/rails/initializable.rb:30:inrun'
/var/lib/gems/2.1.0/gems/railties-3.2.21/lib/rails/initializable.rb:55:in block in runinitializers'
/var/lib/gems/2.1.0/gems/railties-3.2.21/lib/rails/initializable.rb:54:ineach'
/var/lib/gems/2.1.0/gems/railties-3.2.21/lib/rails/initializable.rb:54:in runinitializers'
/var/lib/gems/2.1.0/gems/railties-3.2.21/lib/rails/application.rb:136:ininitialize!'
/var/lib/gems/2.1.0/gems/railties-3.2.21/lib/rails/railtie/configurable.rb:30:in methodmissing'
/var/www/strano/config/environment.rb:5:in<top (required)>'
/var/lib/gems/2.1.0/gems/railties-3.2.21/lib/rails/application.rb:103:in requireenvironment!'
/var/lib/gems/2.1.0/gems/railties-3.2.21/lib/rails/application.rb:305:inblock (2 levels) in initializetasks'
Tasks: TOP => db:setup => db:schema:loadifruby => environment
(See full trace by running task with --trace)