fix($cordovaSQLite): changing the parameters

BREAKING CHANGE: the api has changed

Follow these steps to migrate:

Before:

```
$cordovaSQLite.openDB('yourDBName')
$cordovaSQLite.openDBBackground('yourDBName')
```

After:

```
$cordovaSQLite.openDB({ name: 'yourDBName' })
$cordovaSQLite.openDB({ name: 'yourDBName', bgType: 1 })
```

Docs are updated soon

fixes #273
Merge pull request #277 from mrzmyr/fix-sqlite-params

fix($cordovaSQLite): changing the parameters