moved domeRadius and domeMargin into BleepoutParameters

this will allow code outside of a round to access them, such as for
round ended message display (see #72)
added basic round ended message

see #72
it doesn’t work well in the standalone version, but it works when
running inside radome
the message is still really minimal, and needs additional information
added to it
Merge branch 'round-ending-and-scoring'