Added additional test condition for toggle_availability method in tool model.
Added I18n.enforce_available_locales set to false in config/locales/application.rb
Added tests to check for item's existence in tool_spec.rb
Modified conditions in edit item for tool_spec.rb
Merge pull request #24 from xamroc/spec-revision

Spec revisions
Modified schema through migration.
Merge pull request #25 from xamroc/new-schema

Modified schema through migration.
Merge branch 'master' of https://github.com/cvetter34/project3 into revise
Added testing for user_spec.rb to test the 1-to-many relationship between user and tool
Added testing cases for tool_spec.rb to test the model relationship