Update EloquentStatementRepository.php

Fix wrong condition checking in EloquentStatementRepository::doesStatementIdExist().
Merge pull request #218 from LearningLocker/develop

Update readme and contributors
Merge pull request #219 from LearningLocker/develop

Further readme tweaks
Merge pull request #220 from LearningLocker/develop

Move the edit site settings button
Merge pull request #210 from andytruong/bug/EloquentStatementRepository-doesStatementIdExist

Fix wrong condition checking in EloquentStatementRepository::doesStatementIdExist()
Merge pull request #221 from LearningLocker/develop

Closes #151
Merge pull request #222 from LearningLocker/master

Eloquent