Eight One One - One Language only please

Patch release to fix an issue where uSync can delete the wrong language when parent language code is present.

Fixes #33 - issues where deleting language "en-US" results in "en" being deleted instead.

this patch works around an UmbracoCMS issue (umbraco/Umbraco-CMS#5959) - and ensures we only ever do things to the exact language we where looking for.

Also contains*

#32 Typo Fix in ContentEdition nuget package
87abf3b - Don't delete files from DomainFolder on full delete

*these fixes have little to no impact on operation of uSync