Updated Disk Task

Updated Dist task because repetitive DLR include  was causing the build
to failing under mono 3.0.3
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Removed this section to support mono command line build.

The build was falling through to this section instead of using the
["$(Runtime) == 'Mono' ] code. This change helps support Msbuild,
Xbuild, and Visual Studio
Merge pull request #5 from robertlj/master

Updated Dist task