Merge pull request #10 from wuethrich44/master

Fixed #9 Inject mailer service.
Fix wrong mail adress in from header entry
Merge pull request #11 from wuethrich44/patch-1

Fix wrong mail adress in from header entry
Send code-coverage to scrutinizer
Create .scrutinizer.yml
Merge pull request #15 from wuethrich44/patch-2

Enable code-coverage
Update .travis.yml

Added php v5.6 and hhvm
fix code coverage upload
Update .scrutinizer.yml
Added code coverage batch, fixed #14
Merge pull request #17 from wuethrich44/unit_test

Improve coverage
Update version in installation
getUserMapper method should be private
Improve coverage (UserRegistrationControllerTest)
Remove testGetUserMapper() (protected method)
Remove test404() (unnecessary)
Add invalid form testcase to UserRegistrationControllerTest (100% Coverage)