Add Method:withAny() - this allows $builder->abc()->withAny()

This will accepts any calls (with any parameters) to $mock->abc()
Workaround for mocking some(!) internal classes [#18]

see http://forum.nette.org/cs/14953-mock-tridy-dedici-od-reflectionclass
Merge branch 'fix/internal-class-mocking' into jasir-master

* fix/internal-class-mocking:
  Workaround for mocking some(!) internal classes [#18]