Update ensembl_powered.html

Added Selectome as per a user request.
Merge branch 'release/75' into feature/search-improvements-75
Movie link updated to point to git installation
Fixed a couple of broken links to variation API tutorial
Simplified structure - headings are neater than dl lists
Remove config in wrong place.
Search config: allow lowercase latin in sp. map.
Species-specific autocomplete suggestions.
Move search current_species detector to utils.
Species-specific suggestion box.
Return top gene hit more often.
Merge branch 'feature/tools-dev' into release/75
Copyright notice.
Don't try to quote quoted searches.
Search: show "content" field for docs results.
Reinstate basic direct link functionality.
High priority news items for 75
get URLs right for new news items
Direct links on many/no species.
DirectLinks: handle underscoes, spaces correctly.