Finalize transaction hooks and functionality, add to tests (#114)

* Finalize transaction hooks and functionality, add to tests

* Remove docs from readme (moved to feathers-docs)

README.md

@@ -96,56 +96,6 @@ todos
 
 You can run this example by using `node server` and going to [localhost:8080/todos](http://localhost:8080/todos). You should see an empty array. That's because you don't have any Todos yet but you now have full CRUD for your new todos service!
 
-# Transaction Support
-A example of using the transaction hooks:
-```javascript
-// A common hooks file
-import { hooks } from 'feathers-knex';
-
-const { transaction } = hooks;
-
-const logger = require('./hooks/logger');
-
-module.exports = {
-  before: {
-    all: [transaction.start({ dbServiceName: 'knexClient' })],
-    find: [],
-    get: [],
-    create: [],
-    update: [],
-    patch: [],
-    remove: []
-  },
-
-  after: {
-    all: [logger(), transaction.end()],
-    find: [],
-    get: [],
-    create: [],
-    update: [],
-    patch: [],
-    remove: []
-  },
-
-  error: {
-    all: [transaction.rollback(), logger()],
-    find: [],
-    get: [],
-    create: [],
-    update: [],
-    patch: [],
-    remove: []
-  }
-};
-```
-
-To use the transactions feature, you must ensure that the three hooks (start, commit and rollback) are being used.
-
-At the start of any request, a new transaction will be started. All the changes made during the request to the services that are using the `feathers-knex` will use the transaction. At the end of the request, if sucessful, the changes will be commited. If an error occurs, the changes will be forfeit, all the `creates`, `patches`, `updates` and `deletes` are not going to be commited.
-
-The object that contains `transaction` is stored in the `params.transaction` of each request. If you must extend the `feathers-knex` service, use the `params.transaction.trx` to make your database calls, or simply call the method `this.db(params)` inside a class that extends de `feathers-knex` service.
-
-
 ## License
 
 Copyright (c) 2016