Merge pull request #118 from slde-batman/experimental/di-integration-slim

moved cache and config services to DIC
Implement new shopware configuration loader to load the shopware configuration before the shopware application booted.
Remove symfony components from library, load with composer instead.
Add new shopware configuration loader
Merge remote-tracking branch 'github/experimental/di-config-loader' into experimental/di-integration-slim

Conflicts:
	engine/Shopware/Configs/services.xml
Code cleanup and refactorings.
preparing container plugin integration
preparing plugin container