Merge pull request #25 from pveller/master

Ensure Shared property of a field is properly propagated when FakeDb generates a template and also ensure copying an item carries it over (along with the Type property)
Switching database when initializing new Db context
Fixed error when regestering the same pipeline twice
Enabled nuget symbol packages
Introduced simple FakeSiteContext
Normalize all the line endings
Nirmalize line endings
Updated changelog
Added tips about using Sitecore.Abstractions