Move unit tests to tests/Unit

.gitignore

.scrutinizer.yml

.travis.yml

composer.json

tests/Unit/AppInfo/ApplicationTest.php

tests/Unit/Command/CreateAccountTest.php

tests/Unit/Controller/AccountsControllerTest.php

tests/Unit/Controller/AliasesControllerTest.php

tests/Unit/Controller/AutoconfigControllerTest.php

tests/Unit/Controller/AvatarControllerTest.php

tests/Unit/Controller/FoldersControllerTest.php

tests/Unit/Controller/LocalAttachmentsControllerTest.php

tests/Unit/Controller/MessagesControllerTest.php

tests/Unit/Controller/PageControllerTest.php

tests/Unit/Controller/PreferencesControllerTest.php

tests/Unit/Controller/ProxyControllerTest.php

tests/Unit/Db/AliasMapperTest.php

tests/Unit/Db/CollectedAddressMapperTest.php

tests/Unit/Db/MailAccountMapperTest.php

tests/Unit/Db/MailAccountTest.php