feat(ionicnative): add instance wrapper

closes https://github.com/driftyco/ionic-native/issues/86

https://github.com/driftyco/ionic-native/issues/79

src/plugins/sqlite.ts

@@ -0,0 +1,106 @@
+import {CordovaInstance, Plugin, Cordova} from './plugin';
+declare var sqlitePlugin;
+/**
+ * @name SQLite
+ */
+@Plugin({
+    pluginRef: 'sqlitePlugin'
+})
+export class SQLite {
+
+    private _objectInstance : any;
+    get databaseFeatures() : any {
+        return this._objectInstance.databaseFeatures;
+    }
+
+    constructor (config : any) {
+       new Promise((resolve, reject) => {
+           sqlitePlugin.openDatabase(config, resolve, reject);
+       }).then(
+           db => this._objectInstance = db,
+           error => console.warn(error)
+       );
+    }
+
+    @CordovaInstance({
+        sync: true
+    })
+    addTransaction (transaction : any) : void {}
+
+    @CordovaInstance()
+    transaction (fn : any) : Promise<any> {return}
+
+    @CordovaInstance()
+    readTransaction (fn : any) : Promise<any> {return}
+
+    @CordovaInstance({
+        sync: true
+    })
+    startNextTransaction () : void {}
+
+    @CordovaInstance()
+    close () : Promise<any> {return}
+
+    @CordovaInstance({
+        sync: true
+    })
+    start () : void {}
+
+    @CordovaInstance()
+    executeSql (statement : string, params : any) : Promise<any> {return}
+
+    @CordovaInstance()
+    addSatement (sql, values) : Promise<any> {return}
+
+    @CordovaInstance()
+    sqlBatch (sqlStatements : any) : Promise<any> {return}
+
+    @CordovaInstance({
+        sync: true
+    })
+    abortallPendingTransactions () : void {}
+
+    @CordovaInstance({
+        sync: true
+    })
+    handleStatementSuccess (handler, response) : void {}
+
+
+    @CordovaInstance({
+        sync: true
+    })
+    handleStatementFailure (handler, response) : void {}
+
+
+    @CordovaInstance({
+        sync: true
+    })
+    run () : void {}
+
+
+    @CordovaInstance({
+        sync: true
+    })
+    abort (txFailure) : void {}
+
+
+    @CordovaInstance({
+        sync: true
+    })
+    finish () : void {}
+
+
+
+    @CordovaInstance({
+        sync: true
+    })
+    abortFromQ (sqlerror) : void {}
+
+
+    @Cordova()
+    static echoTest () : Promise<any> {return}
+
+    @Cordova()
+    static deleteDatabase (first) : Promise<any> {return}
+
+}