merged changes from the SalesManager branch
Corrected Application's name & directory
Fixed spelling mistakes in comments & XML docs
Updated resource names in ExtensibleFramework.App

Related to commit below
=================
Author:		Franz Alex Gaisie-Essilfie <falexge@gmail.com>
Date:		07/09/2014 17:02:39
Commit hash:	2bd03bce7fddf78b841780b41a6b62377e8e87c9
Parent(s):	d2fc54ca85

Corrected Application's name & directory
Contained in branches: master
Updated Assembly Info on ExtensibleFramework.Core library
Implemented JSON-based settings in LEAF.Core library

Plug-ins now have access to settings
Builds successfully, awaiting testing
Fixed spelling error
Added Sales Manager plug-in project on a new a new branch.
Added string.IsNullOrEmpty(str) extension method.
Database implementation via XpressData.

 - Plug-in gets database path from settings.
 - Prompts for database as fallback method.
Python-style string.Join() extension method
Partial implementation of client list

 - Load & display clients
 - Delete clients