handle crashing ide runtimes better

show dialog with reason and open dialog to reconfigure
releng: small fixes
add @noimplement to model interfaces
make ErlMember.upToEndOfToken protected
remove IWorkingCopy
update ruby version
small fixes
small fix
misc small fixes
remove unused OverlayPage classes
move IErlModule methods to ISourceUnit
remove unused ISourceUnit.getTimestamp
project config cleanups
update xtend to 2.6.1
xtend generated diff
fix synchronization issue when starting shell
gh189 - stop an erlang shell connected to an external erlang node
clean up some todo tasks
small fixes
cleanup plugin dependencies; remove empty core.api