Add failing tests for random reference property
Make property work with random references
Merge remote-tracking branch 'Herzult/fix/random-reference-property'
Update changelog
ISSUE-22 handle unique fields
ISSUE-22 handle unique fields, changed the scope of unique fields to a class
Update deps
Add support for Symfony 2.3+
Update branch-alias
Merge remote-tracking branch 'nikita2206/master'
Adjust unique syntax from ! to (unique) in the key
Add infos about unique constraints to the README
Remove outdated BC break warning
Add handling for arrays in unique values, refs #23
Add a simple logging method.

This allow clean output rendering when dealing with large fixtures.
Add exception and test if logger is not callable
allow the creation of new Loader for each differing combination of options; a new test that checks this functionality
generateLoaderKey now handles providers that are objects, not strings; an additional test
Merge pull request #27 from croshchupkin/fixtures-getloader-differing-options-support

Allow the creation of new Loader instance for each differing combination of options in Fixtures::getLoader()
Merge remote-tracking branch 'le-phare/feature/basic-logging-system'