Remove redundant parameter documentation.

DOCS.md
	-Rather than repeating parameter documentation verbatim for
	similar endpoints, simply reference the related endpoints.

DOCS.md

@@ -1,21 +1,20 @@
 ## /search
 
-Full text search endpoint which queries the elasticsearch doc store, slightly slower than suggest.
+The full text search endpoint that matches the name of a place to points on the planet.
 
 #### Required Parameters
-* **input**: query string
+* **input**: the string to search for (eg `new york city` or `london`)
 
 #### Optional Parameters
-* **lat**: latitude
-* **lon**: longitude
+* **lat**, **lon**: the latitude/longitude coordinates to bias search results towards (may increase relevancy)
 * **zoom**: zoom level from which you wish to view the world
 * **size**: number of results requested (defaults to 10)
-* **layers**: datasets you wish to query (defaults to `poi,admin,address`).
-  * valid values are `poi`, `admin` or `address`
+* **layers**: the datasets you wish to query (defaults to `poi,admin,address`). Valid values are:
+  * aliases for multiple datasets like `poi`, `admin` or `address`
     * `poi` expands internally to `geoname`, `osmnode`, `osmway`
     * `admin` expands to `admin0`, `admin1`, `admin2`, `neighborhood`, `locality`, `local_admin`
     * `address` expands to `osmaddress`, `openaddresses`
-  * can also be specific to one particular dataset, for example `geoname`
+  * the name of one particular dataset, like `geoname` or `osmaddress`
 * **bbox**: the bounding box from which you want all your results to come
   * can be one of the following comma separated string values
     * "southwest_lng,southwest_lat,northeast_lng,northeast_lat" `L.latLngBounds(southwestLatLng, northeastLatLng).toBBoxString()`
@@ -30,29 +29,24 @@ Full text search endpoint which queries the elasticsearch doc store, slightly sl
 ## /search/coarse
 
 This is a coarse forward geocoder endpoint which only searches admin dataset layers.
+Like the `/search` endpoint, but performs a "coarse" search, meaning that it only searches administrative regions
+(countries, states, counties, neighborhoods, etc.).
 
 #### Required Parameters
-* **input**: query string
+Same as `/search`.
 
 #### Optional Parameters
-* **lat**: latitude
-* **lon**: longitude
-* **zoom**: zoom level from which you wish to view the world
-* **bbox**: the bounding box frome which you want all your results to come
-* **size**: (defaults to 10)
-* **layers**: (defaults to `admin`)
-* **details**: (defaults to `true`)
-
+Same as `/search`.
 
 ## /suggest
 
-The autocomplete endpoint, it offers fast response time. Mixes results from around the provided lat/lon and also from precision level 1 and 3.
+The autocompletion endpoint that offers very fast response times; ideal for completing partial user input. Mixes
+results from around the provided lat/lon coordinates and also from precision level 1 and 3.
 
 #### Required Parameters
 * **input**: query string
-* **lat**: latitude
-* **lon**: longitude
-  * lat/lon are **required** currently because of this [open issue](https://github.com/elasticsearch/elasticsearch/issues/6444)
+* **lat**, **lon**: The latitude/longitude coordinates to bias results towards.
+  * lat/lon are currently **required** because of this [open issue](https://github.com/elasticsearch/elasticsearch/issues/6444)
 
 #### Optional Parameters
 * **zoom**: zoom level from which you wish to view the world
@@ -60,48 +54,35 @@ The autocomplete endpoint, it offers fast response time. Mixes results from arou
 * **layers**: datasets you wish to query (defaults to `poi,admin,address`)
 * **details**: (defaults to `true`)
 
-
 ## /suggest/coarse
 
 Only queries the admin layers.
 
 #### Required Parameters
-* **input**: query string
-* **lat**: latitude from where you are searching
-* **lon**: longitude
-  * lat/lon are **required** currently because of this [open issue](https://github.com/elasticsearch/elasticsearch/issues/6444)
+Same as `/suggest`.
 
 #### Optional Parameters
-* **zoom**: zoom level from which you wish to view the world
-* **size**: number of results requested (defaults to 10)
-* **layers**: datasets you wish to query (defaults to `admin`)
-* **details**: (defaults to `true`)
+Same as `/suggest`.
 
 
 ## /suggest/nearby
 
-Works as autocomplete for places located near a latitude/longitude, this endpoint is the same as `/suggest` but the results are all from within 50 kilometers of the specified point.  Unlike `/suggest`, `/suggest/nearby` does not mix results from different precision levels (500km, 1000km etc from lat/lon).
+Works as autocomplete for only the places located near a latitude/longitude; this endpoint is the same as `/suggest`
+but the results are all from within 50 kilometers of the specified point.  Unlike `/suggest`, `/suggest/nearby` does
+not mix results from different precision levels (500km, 1000km etc from lat/lon).
 
 #### Required Parameters
-* **input**: query string
-* **lat**: latitude
-* **lon**: longitude
-  * lat/lon are **required** currently because of this [open issue](https://github.com/elasticsearch/elasticsearch/issues/6444)
+Same as `/suggest`.
 
 #### Optional Parameters
-* **zoom**: zoom level from which you wish to view the world
-* **size**: number of results you need (defaults to 10)
-* **layers**: datasets you wish to query (defaults to `poi,admin,address`)
-* **details**: (defaults to `true`)
-
+Same as `/suggest`.
 
 ## /reverse
 
-Reverse geocoding endpoint.
+The reverse geocoding endpoint; matches a point on the planet to the name of that place.
 
 #### Required Parameters
-* **lat**: latitude
-* **lon**: longitude
+* **lat**, **lon**: The coordinates of the point.
 
 #### Optional Parameters
 * **zoom**: zoom level from which you wish to view the world
@@ -112,7 +93,7 @@ Reverse geocoding endpoint.
 
 ## /doc
 
-Retrieves a document or multiple documents at once.
+The endpoint for retrieving one or more elasticsearch documents with specific ids.
 
 #### Required Parameters
 * one of **id** or **ids**