Feature tests for scientific names.
Display note on successful sciname deletion.
Link scinames to crops, don't show numeric crop IDs
Test HTTP statuses in sciname feature tests

This makes it easier to tell the difference between "test failed because
the expected content isn't there" and "test failed because the whole
page is broken". It also guards against "test passed incorrectly because
the expected content was part of the error message".
Merge pull request #433 from pozorvlak/feature_tests_for_scinames

Feature tests for scientific names