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/; 
		}