Release console when ios-sim cannot start

Add call for ios-sim --version in order to determine if Xcode and ios-sim versions are compatible. In case they are not, the command will return error - catch it and break the whole execution. Print the error message from ios-sim --version, but remove its stack first as any throw in child_process.stderr.on(...) prints its callstack automatically. So new option is added to errors - hideCallStack. In case it is true, the stack option is set to null.
Merge pull request #85 from telerik/vladimirov/print-errors-from-ios-sim

Release console when ios-sim cannot start