Merge remote branch 'upstream/master'
Moved exceptions out of Controller package and into new Exception package.

IaxsCore\Controller\Exception => IaxsCore\Exception

The existing exceptions make sense outside of controllers, so they were
moved so they can be re-used by other packages.
Merge pull request #4 from lightster/move-exceptions-from-controller-package

Moved exceptions out of Controller package and into new Exception package.