Changes

Restructured project
Cleaned unnecessary files
Added useful Middleware:
- CSRF protection
- Form validation
- Keeping input data between requests
- Authenticated-/Guest-only routes
Changed some Propel settings:
- Models are now namespaced and go into the 'app' directory
- Use propel generated database config (propel/generated-conf/config.php) in bootstrap/bootstrap.php instead of static/manual config (bootstrap/database.php)
- Removed the no longer needed config file and related entries in config/settings.php). Updated classes/files that use the models to use the namespaced ones
Updated used Twitter Bootstrap and Font-Awesome
- Added their "raw" files for convenient modifying
Updated README correspondingly

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