From branch 68 : Added support for datahub as a url type Modified url  code to look at file extension if no format specified in url Added an option to specify the top level menu name for a datahub url source Added support for some datahub options for tracks (viewLimits, maxPixelHeights
From branch 68 :
Added support for datahub as a url type
Modified url  code to look at file extension if no format specified in url
Added an option to specify the top level menu name for a datahub url source
Added support for some datahub options for tracks (viewLimits,
maxPixelHeights

+ a change from Beth for alt v ref alignment display, which was only on
branch

Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode