Design Specs: GBrowse Integration

1. use the front proxy (nginx) to pass requests from /gb2 to the gbrowse server.

On dev, I have 
 	location /gb2 {

proxy_pass http://localhost:9005; } location /gbrowse2/i/ { alias /usr/local/wormbase/website/staging/extlib/gbrowse2/current/tmp/images/; }

location /gbrowse2/ { alias /usr/local/wormbase/website/staging/extlib/gbrowse2/current/html/; }