Remove sync over async GetSource() WinForms example
Remove the GetSource() sync-over-async wrapper from WebView again
Revert "Add GetText() sync method"

This reverts commit 9369967c7ffca456e3ac286df3ad8efafe263f95.
Back out .NET 4.5 Task stuff for now
Merge pull request #377 from jornh/no-sync-over-async

No sync over async