- added composer.json
Update README.md

Basic installation steps added in readme file.
Update README.md
- rename target directory.
Update README.md
- model updated.
Merge branch 'master' of https://github.com/Oxind/OxindFeedbackBundle
- added model for comment and votes to suggestions.
Merge branch 'master' of https://github.com/Oxind/OxindFeedbackBundle into feature/configuration