Added prophecy phpunit to test bundle

- Better mocking library to use in PHPUnit tests
Merge pull request #20 from sulu-cmf/feature/prophecy

Added prophecy phpunit to test bundle
Moved prophecy-phpunit to require not require-dev
Merge pull request #22 from sulu-cmf/bug/prophecy-included-in-wrong-section

Moved prophecy-phpunit to require not require-dev
Merge branch 'master' into develop
updated dependencies
updated version numbers
added template resolver
Merge branch 'feature/template-resolver' into develop
adapted content mapper interface
Merge branch 'feature/navigation-context-webspac' into develop
updated test case due to security changes
updated version numbers
Merge branch 'develop'

Conflicts:
	composer.json