Put WPF UI elements in place

- No more fading and storyboards this time :D
- Put loading icons in proper position
- Put images in images directory
- Put in version number label
- UserStyleSheets to remove cef scrollbar
- Added new backgrounds
- loadingIcons will now flash when the page is loading
- put thirdparty csprojs to thirdparty dir
- added post-build event to copy cef libs