Unify results-tables

For search results, only use one table for both bridges and relays.
Include bootstrap-markup and an indicator for bridge or relay.
Style the bandwidth graphs

Add some margin to the y-axis, use a tight layout for proper label positioning
and include a legend for the linechart.
Add topten-route

Include a simple query to Onionoo to fetch the first 10 relays in a descending
order of their consensus-weight.
Implement tabbed view for graphs

Among some other styling-fixes to the details-templates, implement a tabbed
view for graphs. This also involves changing the datastructure for the internal
'graphs' object used in the view to an OrderedDict to maintain a logical order.
Include a custom stylesheet taking care of the pure-CSS tabs used for the
different graph-periods.
Refactor index-page

Add content to the index page, explaining what navigator does. Add a searchbar
to the front page, and explain what parameters can be used.
Place all site-content in a container-class.