#347 change "Execution terminated" to something more meaningfull

[Marek Januszewski]

in compiler tab "Execution terminated" sound like
something went wrong. it needs to be changed to
"Execution terminated successfully" or something that
would indicate if there was an error or warning, or not.

[greencow]

Logged In: YES
user_id=1125267

agreed. i thought i had a compile option set incorrectly and
spent about a half hour just trying to get that message to
go away.