small changes to nuspec files (not sure why)
implement parts of #41. update Bootstrap target
updated PagedList.Mvc to v4
forgot to update sln
Merge branch 'master' of https://github.com/TroyGoode/PagedList

Conflicts:
	src/PagedList.Mvc/HtmlHelper.cs
	src/PagedList.Mvc/PagedListRenderOptions.cs