much more standardization of gbrowse config

* is going to require substantial work reconciling
  difference between GFF2 and GFF3.
* address issues in:
      ** #959 (standardize GFF)
      ** #815 (B.malayi instance)
      ** closes #831 (A. suum instance)
      ** #663 (change of function alleles)
turned on error log for now - should be disabled in prod
Merge branch 'staging' of github.com:WormBase/website into staging