Update to v2.0.2

Update version to 2.0.1

Update installer version

Fixed bug where playlists that contain a game which no longer exists …

…would crash the application.

Using asterisk for Product ID to avoid having to manually updated Xog…

…ar GUID in wix in the future.

Merge pull request #25 from indyK1ng/Issue24

Merging solution for #24

Potential fix for issue with attempting to save Steam install directo…

…ry to the Program Files folder.

Updated Product's ID attribute to learn how WiX version upgrading wor…

…ks and added other WiX version upgrade utilities.

Made some minor bugfixes and made some fields update more automatically.

Retargetting the GUI for .NET 4.0 instead of 4.5 because I goofed.