fix createNote bug in LinkedNoteStoreClient; 

1. fix createNote bug in LinkedNoteStoreClient; split the createNote to two steps so that developers can reuse Guid of sharedNotebook

2. add createBusinessNoteStoreClient in ClientFactory so that developer can reuse AuthenticationResult; 

3. make some getters public, so that developers can easily inherit and extend classes in the package com.evernote.clients, also make developers easily reuse some source code.