Case Sensitive namespace fix

On local both variants works. But on some hosting environments not.
[composer#2767](https://github.com/composer/composer/issues/2767)
fixed wrong demo IP
Merge pull request #33 from sim2github/CaseFix

[fix] Case Sensitive namespace fix for Composer's autoloader
writing rights to css folder
auto-install-guideline for Ubuntu 14.04 LTS
Rename model.php to Model.php

PSR-4: The terminating class name corresponds to a file name ending in .php. The file name MUST match the case of the terminating class name.
The subdirectory name * MUST match the case* of the sub-namespace names.
PSR-4 spec namespace \<NamespaceName>(\<SubNamespaceNames>)*\<ClassName>
Merge pull request #36 from sim2github/CaseFix

Case fix
Slim upgrade from 2.4 to 2.5
changelog updates
Update README.md
Merge pull request #1 from panique/master

Merge to current