Add junit-dep 4.11 dependency for compatibility with IntelliJ IDEA 13.
Add IntelliJ IDEA module files to .gitignore.
Add missing Locale arg for SphereClient example
Merge pull request #12 from commercetools/inventory

Inventory (for now only for Java client and without SupplyChannels)
expose basic inventory API to Play SDK (experimental API).
Merge branch 'master' into inventory-with-supply-channels
Add missing members (id, version, roles) to SupplyChannel.