Get all key/value pairs for a keyvalue store. (#6)

* Support key/value pairs for keyvalue store.

* Additional docs for POSTing key/value pairs.

* Display all keys and values from a keyvalue store.

Author: Hayden Young

README.md

@@ -239,6 +239,22 @@ curl -X GET http://localhost:3000/db/feed/iterator -d 'limit=-1'
 See [OrbitDB's Iterator API](https://github.com/orbitdb/orbit-db/blob/master/API.md#iteratoroptions-1)
 for more information.
 
+### GET /db/:dbname/all
+
+Gets all items from a keyvalue database :dbname.
+
+Returns all items from a keyvalue store as a JSON object.
+
+Can only be used on keyvalue.
+
+```shell
+curl -X GET http://localhost:3000/db/all
+```
+
+```json
+{"Key1":{"name":"Value1"},"Key2":{"name":"Value2"},"projects":"{["orbitdb","ipfs"]}}
+```
+
 ### POST|PUT /db/:dbname/add
 
 Adds a new entry to the eventlog or feed database :dbname.
@@ -273,7 +289,7 @@ For the keyvalue store, a JSON object containing the variables `key` and
 `value` must be passed in the POST data:
 
 ```shell
-curl -X POST http://localhost:3001/db/keyvalue/put  -H "Content-Type: application/json" -d '{"key":"Key","value":{ "name": "Value" }}'
+curl -X POST http://localhost:3000/db/keyvalue/put  -H "Content-Type: application/json" -d '{"key":"Key","value":{ "name": "Value" }}'
 ```
 
 ### POST|PUT /db/:dbname/inc

src/lib/orbitdb-api.js

@@ -160,6 +160,12 @@ class OrbitdbAPI extends Express {
             return res.json(contents)
         }));
 
+        this.get('/db/:dbname/all',  asyncMiddleware( async (req, res, next) => {
+            let db
+            db = await dbm.get(req.params.dbname)
+            return res.json(db.all())
+        }));
+
         this.get('/db/:dbname/value',  asyncMiddleware( async (req, res, next) => {
             let db, val
             db = await dbm.get(req.params.dbname)