New modules should use the ZF\Apigility\Autoloader

- instead of the Zend\Loader\StandardAutoloader implementation, as it
  allows underscores in both namespaces and class names.
Use ZF\Apigility\Autoloader

- instead of StandardAutoloader
Moved zf-configuration controllers into admin

- Allows zf-configuration to have zero dependencies, other than on ZF2.
- All other admin API controllers are in this module as well; should keep them
  together.
PSR-4

- Updates package structure to use PSR-4
Remove coveralls support

- was erroring on travis due to inability to read clover XML, and coveralls has
  literally never run the repo.
Enable PHP 5.3 tests for travis
CS fixes
Initial changes to config to support full list of input-filters
Moved new InputFilter code to psr-4 standard