Fix issue #647: when converting from AI1 to AI2 project, create <screen>.yail files if missing

Change-Id: I3c08b2bcc4f582a31e882cb3e0f877e07ba58c30
Removed unnecessary call to ask about project type- we only have one project type

Change-Id: I19ec8c41ced0b46beb7e8785b456531dd86553b2