Updated Zend/Form/Factory to allow for custom injection of factories when a fieldset is created and configured
Removing Trailing Whitespace
Clean up of a micro-optimization per @prolic
Corrected a variable name issue (causing test failure)
Added Test Methods:

testCanCreateFormsAndSpecifyFactory
testCanCreateFactoryFromArray
testCanCreateFactoryFromConcreteClass
testCanCreateFormFromConcreteClassAndSpecifyCustomValidatorByName

The 4th being the most important. It tests for the existance of a custom validator.
Merge branch 'hotfix/4771'

Close #4771
Merge branch 'feature-form-factoryinjection' of github.com:tklever/zf2 into pr4666
Merge branch 'pr4666' into develop
Forward port #4666