SmartSync library for the Windows Mobile SDK

This pull includes,

1) SmartSync library for Windows. It has the same Sqlite requirements as SmartStore.
2) SmartSyncExplorer sample application. Currently it is optimized for desktop, future update will include phone optimized version as well.

SmartSyncExplorer:

The sample demonstrates how you set up SmartSync and SmartStore to retrieve Salesforce Contact objects.  Once you make the link you can use SyncDown and SyncUp to retrieve an update objects based on changes the user made on the device.  The sample app also demonstrates how you can tie the data into an ItemSource, make a responsive UI that displays contact cards with animations and automatic sorting and fast on-device filtering.