Add NLog (close #15)

Release v4.3.1

Update WebHelpers to v2 and add support for netfx 4.7.2

Update jQuery to 3.3.1

Update NuGet packages

Add ErrorController to handle 404s and 500s

Release v3.1, which closes #10

Release v3.0.0

Created release build and bumped to version 2.3.11

Bumped to version 1.2