API filtering layers across fields.
API filtering layers across fields.

We need to be able to do substring filtering across several fields (name,
organization, tags). To do this create a custom filter that does a contains
filter on each of these fields and uses an OR type to combine the results.

azavea/raster-foundry,aaronxsu/raster-foundry,aaronxsu/raster-foundry,kdeloach/raster-foundry,raster-foundry/raster-foundry,kdeloach/raster-foundry,raster-foundry/raster-foundry,azavea/raster-foundry,aaronxsu/raster-foundry,azavea/raster-foundry,kdeloach/raster-foundry,azavea/raster-foundry,azavea/raster-foundry,kdeloach/raster-foundry,raster-foundry/raster-foundry,aaronxsu/raster-foundry,kdeloach/raster-foundry