False_class fix and refactoring of its usage.
Testing tool now is separated as CSTester, and is used as composer package.
composer.json added into core directory for system dependencies.
Tiny css fix.
System tested on Nginx + PHP-FPM, Nginx config sample added.
System tested with MariaDB.
Some other small fixes.

System version 0.300
modules:
Blogs 0.048
Comments 0.010
Cron 0.006
Feedback 0.002
HybridAuth 2.1.1-cs23
OAuth2 0.016
Plupload 1.5.7-cs5
Static_pages 0.028
plugins:
Admin_default_theme 0.004
TinyMCE 4.0.1-cs5