Convert core app to Slim framework

Rather than using a homegrown router and related components this patch
begins the conversion of the core app to use the Slim framework via
composer import.

- import Slim and Slim-Views via composer
- core application workflow converted to Slim
- move templates to data directory
- begin migrating classes to \Wikimania\Scholarship namespace
- add psr-0 class loader for new namespace
Move DAOs into namespace
Move Lang into namespace
Remove old files
Move Password into namespace
Use route names to generate urls
Convert login/logout to Slim routes
Reorganize templates
Create base template for reviewer/admin content
Move password change to Slim
Use PHPMailer via Composer
Move phase1 & phase2 grid views to Slim
Nuke review/edit as it was unused by 2013 UI.
Pretend everyone who is authenticated is an admin

This is a hack for the nav until I get a better authorization layer in
place across the backend pages.
Move review/p1/successList to Slim
onvert review/view to Slim
Convert review/p1/failList to Slim
Convert review/p2/list to Slim
Style tweaks for review/p2/list

Mostly just messing around.
Convert review/search to Slim