support new (required) Preloader option: time|notime

This is required to support the latest version of kotlinc-jvm. See [here](http://devnet.jetbrains.com/thread/444344) for more details.

Note: the "notime" option [doesn't currently disable profiling](https://github.com/JetBrains/kotlin/commit/2f65506d765925a6a6d552e5c2b8a280f7cf3ed2#commitcomment-3157563), but it looks like this will be fixed shortly.