Introducing LauncherWPF

[formlesstree4]

Finally! After several weeks of active development, it's finally here: The WPF rewrite of the OpenRCT2 Launcher!

This pull request is quite massive and features nine commits with an awesome number of 42 files changed. Here's a small bullet list of the changes:

• MahApps.Metro serves as the UI framework of choice.
• The OpenRCT API has been wrapped, offering asynchronous and synchronous methods (for those that wish to pull the class out on their own).
• Single version support (multi-version selection coming soon).
• Automatic detection of OpenRCT2 (this will be a setting in future releases).
• Improved detection for RCT2 base installation.
• Crash management services powered by Exceptionless.

There's a lot of work to go still (such as CloudCoaster integration) but this is definitely shaping up to be a pretty awesome Launcher.

Please let me know if there's any glaring issues.