libra live next steps

Some ideas for changes to libra live that could happen over the next few months.

## short term
- we used mapzen search to query place names and get lat/lon. obviously this has to change.
- add some help text in the ui so people have some idea what they're able to do the first time they use it
- rename repos. the naming scheme is a little confusing. we often talk about libra live as the end project, but the user-facing app is in a repo named libra-alexa and the libra-live repo is the tiler. proposed change:
- libra-live -> libra-live-tiler
- libra-alexa -> libra-live
- publish the alexa skill so anyone can use it
- _? suggestions welcome!_

## long term
- design + branding improvements
- put tiles on a map, not just show an image
- see what we can glean from [landsat-tiler](https://github.com/mapbox/landsat-tiler) and [rio-tiler](https://github.com/mapbox/rio-tiler)
- use the [lex api](https://aws.amazon.com/lex/)
- try to make the alexa app more conversational to allow follow up questions, for example:
- "libra, show seattle"
- "now show land/water analysis"
- this may or may not be possible
- ideas for tying in other projects:
- include command for extracting roads from the image with on-the-fly prediction?
- include command for comparing predicted roads vs mapped roads from OSM?
- include command for showing osm edits for a tile within a date range?
- _? suggestions welcome!_