Elastic search store
Adding Nuspec file for elasticsearch
adding NuGet build for elasticsearch
changing project to match VS 2012 builds/msbuild 4.0 and not VS 2013
removing the $author$ and $description$ placeholders as these are not recognized in build script
Merge remote-tracking branch 'originParent/master'

Conflicts:
	CacheCow.msbuild
Merge pull request #73 from damienbod/master

Elastic search store. Thanks!