Add *Of properties to RefResolver

The RefResolver currently skips any part of the schema that contains
'allOf', 'anyOf' or 'oneOf'. This prevents proper resolving of
references ($ref) that are inside of an array that is part of the above
mentioned properties.
Add the three property names to the array that is used to execute
resolveArrayOfSchemas().
Update test case to account for 3 additional parameters

In JsonSchema\Tests\RefResolverTest::testResolve the
JsonSchema\RefResolver::resolveArrayOfSchemas method is now called 7
instead of 4 times due to the addition of 'oneOf', 'allOf' and 'anyOf'.
Change expected count from 4 to 7 in resolveProvider.
fixed "empty array"-bug
Merge pull request #78 from hglattergotz/ofPropertyFix

Add *Of properties to RefResolver
Merge pull request #79 from schmeiserd/master

fixed "empty array"-bug