Indent according to Codeigniter style guide.
Changed directory structure to support Sparks package management.

The directory structure was changed around in preparation to support
the Sparks package management system for CodeIgniter (http://getsparks.org).

The following things took place in this commit:
1. Move all contents of the application/ directory up one level.
 * config/ controllers/ helpers/ language/ libraries/ models/ views/
 * Left captcha/ alone... Not quite sure where to put it yet.
 * Delete the now-empty application/ directory
2. Create vendor/ folder and move phpass into it.
 * (phpass is now in vendor/phpass-0.3/)
3. Change libraries/Tank_auth.php to reflect the new path of the phpass library
4. Add spark.info
 * Spark package management system requires this to work properly