Parse composer.json autoload -> psr-4 section

[vitalyiegorov]

Add modules from psr-4 section to modules list, first of all this will generate correct automatic PSR-4 compliant class autoloader by composer, from other side we will avoid manual loading of modules from "src/" in www/index.php.

No more "dump-autoload" after new class creation.

Limitation, all modules in src should have global namespace prefix for whole project
Profit: auto class loading by composer on creation - no errors, one declaration in composer.json of all dependencies - one file for dependency management

@nik-os What do you think?