Fix #335 Check that delay is not set for freq type 0 trips

[scrudden]

Summary:
This implements the check detailed in issue #335.

It checks if a frequency "type 0" trip has a delay set and if so raises an E054 error.

Expected behavior:

It checks if any of the arrival and departure elements within stop_time_updates have a delay value set. If yes it raises an E054 error.

[barbeau]

@scrudden Thanks for working on this too! This branch includes the E053 rule implemented in #336 too, so I'd say let's get #336 merged before reviewing this PR. Otherwise much of it will end up being affected by the changes/merge of #336.