Merge pull request #88 from dirkrombauts/master

Enabling NCrunch v2
Fix for #85 : NullReferenceError when feature was not run
Merge pull request #86 from freeman/master

Fix issue #85 : NullReferenceException when some NUnit tests were skipped
Merge pull request #89 from dirkrombauts/master

Bring nuspecs uptodate
Version bump (0.13.1)
Merge pull request #92 from dirkrombauts/master

Migrate to automatic nuget package restore
Merge pull request #93 from dirkrombauts/master

Upgrade some nuget packages