Replaced all occurrences of delegates with lambdas.
Removed unnecessary call to Confirm() in WhenDone().
Added back <TargetFrameworkVersion>v4.0</TargetFrameworkVersion> to .csproj files.
Merge branch '2.4_replace_delegates_with_lambdas' into DR-105

Conflicts:
	src/mindtouch.core/DreamHostService.cs