Add spl_autoload_register

Autoloader updated with php-fig psr4 standards
Fix class loader
Add validation for namespace and loads file from basepath
Use register for loading Autoloader
Add documentation
Fix spelling
Merge pull request #4 from aniketpant/develop

Change primary function call and add basic documentation
Merge pull request #5 from collectivism/develop

Autoloader improvements
Merge pull request #2 from collectivism/master

Develop