Changed call from Activator.CreateInstance() to runtime generated func for creating new instance of json as param to urihandler.
Added nullcheck before creating function for message parameters.
fixed failing unittest.
Merge branch 'pokerdemo_fixes' into develop
Changed how system assemblies are added as references when compiling generated serialization code.
Merge branch 'pokerdemo_fixes' into develop
(Alexey) Fixed Cache Control Header
Merge branch 'develop' of github.com:Starcounter/Starcounter into develop

Conflicts:
	src/Starcounter.Internal/Http/Response.cs
Added option to skip checking echoes for gateway tests.
Merge branch 'develop' of https://github.com/Starcounter/Starcounter into develop
Added pokerdemo get player id simulation.
Updated log entry text when a user has logged in
Merge branch 'develop' of github.com:Starcounter/Starcounter into develop
Fixed generated code for creating new instances where the wrong template was used in typed json.
Merge branch 'issue/1940' into develop
Fixed setting initial request after refactoring, solves #1941
Merge branch 'issue/1941' into develop
Merge branch 'develop' of github.com:Starcounter/Starcounter into NewSqlProcessor