Merge pull request #131 from muffato/master

Do not use the low-level _species_tree_node_id() method
Cell line -> cell type.
Fix problem with variation links on sequence page.
Get RSS feeds by category, so we can combine everything in 'new' with a random selection of "did-you-know" items
Remove unnecessary space below slider
Merge branch 'master' of https://github.com/Ensembl/ensembl-webcode
Escape legend HTML (duplication in resequencing).
Removed yellow box
Change bam_and_bigwig to use 'tiling' as BigWig rendering style
This module seems to work fine if it just inherits both glyphsets
Changed APPRIS flags to use coloured text instead of images
Removed as per notice, as obsolete
RT #428984 : zmenus broken in LRG sequence display.
Fix missing legend on some LRGs.
Removed tooltip message from disabled export button, about not being able to export from this page, as there are now export buttons/icons elsewhere on many such pages
Module was still using WebsiteAdaptor for archive-related db queries!
Explicitly set format for ID mapper, as it's just a list rather than a proper format
Needs to use archive db adaptor instead of website one
Added glossary lookup on paralogue type
Don't zoom out beyond extremes of contig.