Toolkit mouse input

Implemented a simple mouse input functionality for Toolkit library.
Added two sample projects - for Desktop and WinRT platforms.
The functionality is XNA-like, however there are some remarks:
1. Not sure if mouse Wheel works as expected as it represents only actual value and not cumulative one.
2. Can't get working the "MakeSharpDX.cmd" script to work (can't guess right parameters?) to test if release package builds correctly.