added categoriey field to accounts form template
added account category entity
added controller for account categories, adjusted entities and repository of account
fixed problem in account form template
implemented tests for get and post
fixed automatic parenting issue
added tests and fixed some issues
added testcase
Merge branch 'develop' of git://github.com/sulu-cmf/SuluContactBundle into feature/type-overlay
added import to accounts tests
added testcase for patch
added tests for patch
added imports to contacts
added imports to importtests
worked on implementation of type-overlay and select
added condition for postgres
added condition for postgres(2)
added backbone model for account category and preselect for account category select
fixed minor issues
changed language keys, method to call type-overlay