Damiaan

There is a check "obj == null", but not for PdfNull which is passed in into the dictionary if the value is null. fixes #287

``` System.InvalidCastException: GetInteger: Object is not an integer. at PdfSharpCore.Pdf.PdfDictionary.DictionaryElements.GetInteger(String key, Boolean create) at PdfSharpCore.Pdf.PdfDictionary.DictionaryElements.GetInteger(String key) at PdfSharpCore.Pdf.PdfPage..ctor(PdfDictionary dict) at PdfSharpCore.Pdf.PdfPages.get_Item(Int32 index) at MyCustomCode ``` the line where it is...

As this projects shows the solution, the AppointmentCreated should be added to the Events when creating the entity.

The tutorial could have been a little more concrete on how to add ssl as you would like to do that in production anyways.

If we continue with the getting started: this PR gets rid of the getting started subpages in the menu

I think the Remarks section is missing a word `If set, this delegate will be called to signature of the token, instead of default processing.` should be `If set, this...

Add an option to avoid tls certificate validation

5

This fixes #89