Removed unused target
Prefixed internal targets with underscore
Full framework should not be built or tested for both netcf and silverlight
Added targets to build and test multiple frameworks in sequence
Using netcf project files when building
BuildAll and TestAll targets ignore failures in order to cope with missing locally installed frameworks
Merge pull request #107 from nunit/feature-building-with-latest-build-tools

MSBuild: batching multiple frameworks and using right project files for compact framework