Adding REJECT_ALL_BLANK_PROC proc
Using :reject_if in code to ensure that it doesnt blow up.
Just a bit lost on a proper failing test @pixeltrix (issue #8)
add all_blank proc
@asanghi since we're overwriting a lot of the nested attribute methods we need tests that exercise a lot of the same things as the tests in the main AR tests - look at the nested attributes test to get an idea of what's needed. Hopefully it's just a copy and paste job!
@asanghi we only need to test the functionality related to the methods we're overriding - config, assignment and destruction.