Search/Filter by Category

[hkrishna]

Related to pelias/openstreetmap#33 and pelias/pelias#50

This issue deals with using the category mapped on a document. Here are a few use cases:

• find all airports in a bbox
• search for a transit station
• find the 10 nearest mexican restaurants

The API should be able to take a parameter lets say category and based on its value - use it in the queries as a filter. For example:

localhost:3100/search?input=maysville&category=restaurant

should return restaurants that are named maysville

localhost:3100/reverse?lat=0&lon=0&category=restaurant:mexican

should return the nearest mexican restaurants to lat/lon 0,0

[missinglink]

this is the query I used in dev: https://gist.github.com/missinglink/dd1dcdb377a0ff271890

[dianashk]

duplicates #128