* simple mapbox viz
use react-map-gl
superclustering of long/lat points
Added hook for map style, huge performance boost from bounding box fix, added count text on clusters
variable gradient size based on metric count
Ability to aggregate over any point property
This needed a change in the supercluster npm module, a PR was placed here:
https://github.com/mapbox/supercluster/pull/12
Aggregator function option in explore, tweaked visual defaults
better radius size management
clustering radius, point metric/unit options
scale cluster labels that don't fit, non-numeric labels for points
Minor fixes, label field affects points, text changes
serve mapbox apikey for slice
global opacity, viewport saves (hacky), bug in point labels
fixing mapbox-gl dependency
mapbox_api_key in config
expose row_limit, fix minor bugs
Add renderWhileDragging flag, groupby. Only show numerical columns for point radius
Implicitly group by lng/lat columns and error when label doesn't match groupby
'Fix' radius in miles problem, still some jankiness
derived fields cannot be typed as of now -> reverting numerical number change
better grouping error checking, expose count(*) for labelling
Custom colour for clusters/points + smart text colouring
Fixed bad positioning and overflow in explore view + small bugs + added thumbnail
* landscaping & eslint & use izip
* landscapin'
* address js code review
* attempt to enchance logging
* clean up logging
* clean up logging
* reset to logger
* clean up imports
* add comments in config.py
* remove redundant declaration of logging.config. Already exists in caravel/__init__.py
* replace RotatingFileHandler with TimedRotatingFileHandler
* revert back running web server in debug mode
* fix debug in bin/caravel
* resolve build errors - formatting
* need to test
* enable time rotateloghandler
* revert back print statements - add feature for rotatetimelog which is needed and make it configurable
* revert back to default in master
* fix build issues
* remove extra print statement
* change log location to default
* configure console log level and format
