Add request detectors for mobile and tablet.

Library MobileDetect has been added as a dependency.
Update to new syntax for Request::addDetector()
Use semantic versioning for since doc blocks
Merge pull request #39 from bcrowe/fix-sem-ver

Use semantic versioning for since doc blocks
Merge pull request #38 from ADmad/mobile-detect

Add request detectors for mobile and tablet.
App.php Configure basic information remove

Remove /app/.htaccess, /app/webroot/.htaccess to /.htaccess, /webroot/.htaccess
Merge pull request #41 from EliuFlorez/patch-2

Update config info.
Promote best practice of using UTC timezone for PHP and database.
Merge pull request #42 from ADmad/utc

Promote best practice of using UTC timezone for PHP and database.
Update comments to reflect debug is now a boolean.
Fix path to default layout.
Fix path to css folder.
Fix a couple typos in email config