Add leveldown module methods and fix issues with the leveldown api definition

levelup/levelup-tests.ts

@@ -35,3 +35,30 @@ db.batch([{
     , valueEncoding : 'json'
 }], (error)=> {});
 
+db.batch()
+    .del('father')
+    .put('name', 'Yuri Irsenovich Kim')
+    .put('dob', '16 February 1941')
+    .put('spouse', 'Kim Young-sook')
+    .put('occupation', 'Clown')
+    .write(function () { console.log('Done!') })
+
+var open:boolean = db.isOpen();
+var closed:boolean = db.isClosed(); 
+db.createReadStream()
+    .on('data', function (data) {
+      console.log(data.key, '=', data.value)
+    })
+    .on('error', function (err) {
+      console.log('Oh my!', err)
+    })
+    .on('close', function () {
+      console.log('Stream closed')
+    })
+    .on('end', function () {
+      console.log('Stream closed')
+    })
+
+import leveldown = require('leveldown');
+leveldown.destroy('mypath', ()=>{});
+leveldown.repair('mypath', ()=>{});

levelup/levelup.d.ts

@@ -10,7 +10,6 @@ interface Batch {
     keyEncoding?: string;
     valueEncoding?: string;
 }
-
 interface LevelUp {
     open(callback ?: (error : any) => any): void;
     close(callback ?: (error : any) => any): void;
@@ -25,11 +24,45 @@ interface LevelUp {
 
     batch(array: Batch[], options?: { keyEncoding?: string; valueEncoding?: string; sync?: boolean }, callback?: (error?: any)=>any);
     batch(array: Batch[], callback?: (error?: any)=>any);
+    batch():LevelUpChain;
+    isOpen():boolean;
+    isClosed():boolean;
+    createReadStream(options?: any): any;
+    createKeyStream(options?: any): any;
+    createValueStream(options?: any): any;
+    createWriteStream(options?: any): any;
+    destroy(location: string, callback?: Function): void;
+    repair(location: string, callback?: Function): void;
+}
+
+interface LevelUpChain {
+    put(key: any, value: any): LevelUpChain;
+    put(key: any, value: any, options?: { sync?: boolean }): LevelUpChain;
+    del(key: any): LevelUpChain;
+    del(key: any, options ?: { keyEncoding?: string; sync?: boolean }): LevelUpChain;
+    clear(): LevelUpChain;
+    write(callback?: (error?: any)=>any) : LevelUpChain;
+}
+
+interface levelupOptions {
+    createIfMissing?: boolean; 
+    errorIfExists?: boolean; 
+    compression?: boolean; 
+    cacheSize?: number; 
+    keyEncoding?: string; 
+    valueEncoding?: string; 
+    db?: string
 }
 
 declare module "levelup" {
 
-    function levelup(hostname: string): LevelUp;
+    function levelup(hostname: string, options?: levelupOptions): LevelUp;
     
     export = levelup;
 }
+
+declare module "leveldown" {
+
+    export function destroy(location: string, callback?: Function): void;
+    export function repair(location: string, callback?: Function): void;
+}