Merge pull request #7 from geobalas/master

Require bug in assets_pipeline
Added validate() to mainframe_helper
Merge branch 'master' of https://github.com/bibakis/Mainframe
Structural changes for demo authentication
Completed demo authentication controller,
added some shorthands to mainframe_helper.php
Updated bootstrap to 2.3.0
Updated CodeIgniter to 2.1.3
Purl (JavaScript URL parser) updated to 2.3.1
Working on assets pipeline logging
Mainframe will auto-create a cache dir if for some reason you don't have one
Changed default session duration to 2 years
Removed twitter bootstrap from temp
mainframe_helper/session() now returns all session data if called without parameters
Updated CodeIgniter to 2.1.4
Added config() shorthand