#128: Some boundary skinparam have to be set a package skinparams too

[kirchsth]

PlantUML realises all boundaries via packages therefore following package specific skinparams have to be set that the boundaries correspond with the defined rectangle<<boundary>> style (techn. text should be not bold and no sterotype should be displayed).

skinparam package {
    StereotypeFontSize 0
    FontStyle plain
}

current master branch without bugfix

@startuml
!include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Context.puml

System_Boundary(c1, "Sample System Boundary") {
   System(twitter, "Twitter")
}

System_Boundary(c2, "Sample System2 Boundary") {
}
@enduml

my local branch with bugfix

@startuml
!include https://raw.githubusercontent.com/kirchsth/C4-PlantUML/extended/C4_Container.puml

System_Boundary(c1, "Sample System Boundary") {
   System(twitter, "Twitter")
}

System_Boundary(c2, "Sample System2 Boundary") {
}
@enduml

All other styles (like color and shadow) can be set via the rectangle specific skinparams (no additional package specific definitions are required).

This PR should fix #128