Merge pull request #8 from dtewinkel/issue7

Fixed issue #7. Now supports semantic versioning.
1.4 release
Updated NuGet.Core version, to fix problem with file paths containing backslashes from being excluded from package metadata
Fixed NullReferenceException when building projects with no project references

Fixed problem with the output directory not being created when building a project with no project references
Added support for including the version number in the output package file name, for parity with the nuget pack command
Built for version 1.5.0
Fixed NullReferenceExceptions in package task

Added nasty reflection hack to bind global MSBuild properties in the package task
Build for version 1.6.0
Added use of NuGet to get NuGet.Core package.
Merge pull request #15 from dtewinkel/UseNuGet

Added use of NuGet to get NuGet.Core package.
Merge remote-tracking branch 'origin/master'

Conflicts:
	MSBuild/Tasks/NuPrepare.cs
	NuBuild.sln