Rebuilding UI in order to reduce the number of markers on map

[mstn]

What changes:

• show stops depending on zoom/bounds
• select single stop, zoom to that stop
• select trip, highlight corresponding route

See also #15

[mstn]

Branch avoid-loading-too-many-markers

[mstn]

Same problem with polylines. We could try to reduce the number of points depending on zoom. Useful resource: http://labs.easyblog.it/maps/gpx-simplify-optimizer/

[elf-pavlik]

@mstn do you still work on optimizing polylines? otherwise i'll pick it up in next days since we need to merge it to master and deploy version which works on mobile devices!

[mstn]

I have no time in these days to look at this issue.

[mstn]

I checked my local version. It is aligned with github.

[elf-pavlik]

ok, i'll pick it up then, thanks for taking it that far!