added tab to formular
added form for tab
implemented first save
added tax class to pricing form
adjusted rest api for tax classes
fixed tests
added currencies to template
removed checkbox in first column
made price field editable
removed datagrid and used simple table instead, because of missing functionality
removed price from product and added currencies
added todos
updated tests
renamed currency name
added product prices to get response
corrected datamapper to send correct request
cleaned code and added tests
added actions for prices
Merge branch 'develop' of git://github.com/sulu-cmf/SuluProductBundle into feature/pricing

Conflicts:
	Resources/config/services.xml
	Resources/translations/sulu/backend.de.xlf
	Resources/translations/sulu/backend.en.xlf
cleaned code